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OpenAI models.
Access 41 models from OpenAI through the Impossibl API, including GPT Chat Latest, GPT-3.5 Turbo, and GPT-4 Turbo. Compare API pricing, context windows, and capabilities.
filter by model type, supported inputs, and context window. select two or three models to compare specifications and estimate the same workload.
- GPT Chat Latest
openai/chat-latest
GPT Chat Latest is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $5.00 per million input tokens. The advertised output rate is $30.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $5.00/1m tokens
- output price
- $30.00/1m tokens
- GPT Image 2
openai/gpt-image-2
GPT Image 2 is a image generation model from OpenAI, available through the Impossibl API. Its published context window is 32,000 tokens. The advertised input rate is $5.00 per million input tokens. The advertised output rate is $30.00 per million output tokens.
OpenAIImage generation
- context
- 32ktokens
- input price
- $5.00/1m tokens
- output price
- $30.00/1m tokens
- GPT Image 2.5 Flare
openai/gpt-image-2.5-flare
GPT Image 2.5 Flare is a image generation model from OpenAI, available through the Impossibl API. Its published context window is 32,000 tokens. The advertised input rate is $5.00 per million input tokens. The advertised output rate is $30.00 per million output tokens.
OpenAIImage generation
- context
- 32ktokens
- input price
- $5.00/1m tokens
- output price
- $30.00/1m tokens
- GPT Image 2.5 Sunburst
openai/gpt-image-2.5-sunburst
GPT Image 2.5 Sunburst is a image generation model from OpenAI, available through the Impossibl API. Its published context window is 32,000 tokens. The advertised input rate is $5.00 per million input tokens. The advertised output rate is $30.00 per million output tokens.
OpenAIImage generation
- context
- 32ktokens
- input price
- $5.00/1m tokens
- output price
- $30.00/1m tokens
- GPT OSS 120B
openai/gpt-oss-120b
GPT OSS 120B is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 128,000 tokens. The advertised input rate is $0.35 per million input tokens. The advertised output rate is $0.75 per million output tokens.
OpenAIText generation
- context
- 128ktokens
- input price
- $0.35/1m tokens
- output price
- $0.75/1m tokens
- GPT OSS 20B
openai/gpt-oss-20b
GPT OSS 20B is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 128,000 tokens. The advertised input rate is $0.075 per million input tokens. The advertised output rate is $0.30 per million output tokens.
OpenAIText generation
- context
- 128ktokens
- input price
- $0.075/1m tokens
- output price
- $0.30/1m tokens
- GPT Transcribe
openai/gpt-transcribe
GPT Transcribe is a speech-to-text model from OpenAI, available through the Impossibl API. The advertised input rate is $0.0045 per minute of audio.
OpenAISpeech to textaudio input
- context
- unknown
- input price
- $0.0045/minute
- output price
- unknown
- GPT-3.5 Turbo
openai/gpt-3.5-turbo
GPT-3.5 Turbo is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 16,000 tokens. The advertised input rate is $0.50 per million input tokens. The advertised output rate is $1.50 per million output tokens.
OpenAIText generation
- context
- 16ktokens
- input price
- $0.50/1m tokens
- output price
- $1.50/1m tokens
- GPT-4 Turbo
openai/gpt-4-turbo
GPT-4 Turbo is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 128,000 tokens. The advertised input rate is $10.00 per million input tokens. The advertised output rate is $30.00 per million output tokens.
OpenAIText generationimage input
- context
- 128ktokens
- input price
- $10.00/1m tokens
- output price
- $30.00/1m tokens
- GPT-4.1
openai/gpt-4.1
GPT-4.1 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,000,000 tokens. The advertised input rate is $2.00 per million input tokens. The advertised output rate is $8.00 per million output tokens.
OpenAIText generationimage input
- context
- 1mtokens
- input price
- $2.00/1m tokens
- output price
- $8.00/1m tokens
- GPT-4.1 mini
openai/gpt-4.1-mini
GPT-4.1 mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,000,000 tokens. The advertised input rate is $0.40 per million input tokens. The advertised output rate is $1.60 per million output tokens.
OpenAIText generationimage input
- context
- 1mtokens
- input price
- $0.40/1m tokens
- output price
- $1.60/1m tokens
- GPT-4.1 nano
openai/gpt-4.1-nano
GPT-4.1 nano is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,000,000 tokens. The advertised input rate is $0.10 per million input tokens. The advertised output rate is $0.40 per million output tokens.
OpenAIText generationimage input
- context
- 1mtokens
- input price
- $0.10/1m tokens
- output price
- $0.40/1m tokens
- GPT-4o
openai/gpt-4o
GPT-4o is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 128,000 tokens. The advertised input rate is $2.50 per million input tokens. The advertised output rate is $10.00 per million output tokens.
OpenAIText generationimage input
- context
- 128ktokens
- input price
- $2.50/1m tokens
- output price
- $10.00/1m tokens
- GPT-4o mini
openai/gpt-4o-mini
GPT-4o mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 128,000 tokens. The advertised input rate is $0.15 per million input tokens. The advertised output rate is $0.60 per million output tokens.
OpenAIText generationimage input
- context
- 128ktokens
- input price
- $0.15/1m tokens
- output price
- $0.60/1m tokens
- GPT-5
openai/gpt-5
GPT-5 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.25 per million input tokens. The advertised output rate is $10.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.25/1m tokens
- output price
- $10.00/1m tokens
- GPT-5 Codex
openai/gpt-5-codex
GPT-5 Codex is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.25 per million input tokens. The advertised output rate is $10.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.25/1m tokens
- output price
- $10.00/1m tokens
- GPT-5 mini
openai/gpt-5-mini
GPT-5 mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $0.25 per million input tokens. The advertised output rate is $2.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $0.25/1m tokens
- output price
- $2.00/1m tokens
- GPT-5 nano
openai/gpt-5-nano
GPT-5 nano is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $0.05 per million input tokens. The advertised output rate is $0.40 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $0.05/1m tokens
- output price
- $0.40/1m tokens
- GPT-5 Pro
openai/gpt-5-pro
GPT-5 Pro is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $15.00 per million input tokens. The advertised output rate is $120.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $15.00/1m tokens
- output price
- $120.00/1m tokens
- GPT-5.1
openai/gpt-5.1
GPT-5.1 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.25 per million input tokens. The advertised output rate is $10.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.25/1m tokens
- output price
- $10.00/1m tokens
- GPT-5.1 Codex
openai/gpt-5.1-codex
GPT-5.1 Codex is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.25 per million input tokens. The advertised output rate is $10.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.25/1m tokens
- output price
- $10.00/1m tokens
- GPT-5.1 Codex mini
openai/gpt-5.1-codex-mini
GPT-5.1 Codex mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $0.25 per million input tokens. The advertised output rate is $2.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $0.25/1m tokens
- output price
- $2.00/1m tokens
- GPT-5.2
openai/gpt-5.2
GPT-5.2 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.75 per million input tokens. The advertised output rate is $14.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.75/1m tokens
- output price
- $14.00/1m tokens
- GPT-5.2 Codex
openai/gpt-5.2-codex
GPT-5.2 Codex is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.75 per million input tokens. The advertised output rate is $14.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.75/1m tokens
- output price
- $14.00/1m tokens
- GPT-5.3 Codex
openai/gpt-5.3-codex
GPT-5.3 Codex is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $1.75 per million input tokens. The advertised output rate is $14.00 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $1.75/1m tokens
- output price
- $14.00/1m tokens
- GPT-5.4
openai/gpt-5.4
GPT-5.4 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $2.50 per million input tokens. The advertised output rate is $15.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $2.50/1m tokens
- output price
- $15.00/1m tokens
- GPT-5.4 mini
openai/gpt-5.4-mini
GPT-5.4 mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $0.75 per million input tokens. The advertised output rate is $4.50 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $0.75/1m tokens
- output price
- $4.50/1m tokens
- GPT-5.4 nano
openai/gpt-5.4-nano
GPT-5.4 nano is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 400,000 tokens. The advertised input rate is $0.20 per million input tokens. The advertised output rate is $1.25 per million output tokens.
OpenAIText generationimage input
- context
- 400ktokens
- input price
- $0.20/1m tokens
- output price
- $1.25/1m tokens
- GPT-5.4 Pro
openai/gpt-5.4-pro
GPT-5.4 Pro is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $30.00 per million input tokens. The advertised output rate is $180.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $30.00/1m tokens
- output price
- $180.00/1m tokens
- GPT-5.5
openai/gpt-5.5
GPT-5.5 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $5.00 per million input tokens. The advertised output rate is $30.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $5.00/1m tokens
- output price
- $30.00/1m tokens
- GPT-5.5 Pro
openai/gpt-5.5-pro
GPT-5.5 Pro is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $30.00 per million input tokens. The advertised output rate is $180.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $30.00/1m tokens
- output price
- $180.00/1m tokens
- GPT-5.6 Luna
openai/gpt-5.6-luna
GPT-5.6 Luna is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $0.20 per million input tokens. The advertised output rate is $1.20 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $0.20/1m tokens
- output price
- $1.20/1m tokens
- GPT-5.6 Sol
openai/gpt-5.6-sol
GPT-5.6 Sol is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $4.00 per million input tokens. The advertised output rate is $20.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $4.00/1m tokens
- output price
- $20.00/1m tokens
- GPT-5.6 Terra
openai/gpt-5.6-terra
GPT-5.6 Terra is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 1,050,000 tokens. The advertised input rate is $2.00 per million input tokens. The advertised output rate is $12.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $2.00/1m tokens
- output price
- $12.00/1m tokens
- GPT-6 Astra
openai/gpt-6-astra
GPT-6 Astra is an OpenAI reasoning model for demanding coding, research, computer use, and document creation. It is designed to work through complex tasks from an initial request to a completed result. Its published context window is 1,050,000 tokens. The advertised input rate is $10.00 per million input tokens. The advertised output rate is $50.00 per million output tokens. Additional pricing brackets apply when the input exceeds a published context threshold.
OpenAIText generationimage input
- context
- 1.05mtokens
- input price
- $10.00/1m tokens
- output price
- $50.00/1m tokens
- OpenAI o1
openai/o1
OpenAI o1 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 200,000 tokens. The advertised input rate is $15.00 per million input tokens. The advertised output rate is $60.00 per million output tokens.
OpenAIText generationimage input
- context
- 200ktokens
- input price
- $15.00/1m tokens
- output price
- $60.00/1m tokens
- OpenAI o3
openai/o3
OpenAI o3 is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 200,000 tokens. The advertised input rate is $2.00 per million input tokens. The advertised output rate is $8.00 per million output tokens.
OpenAIText generationimage input
- context
- 200ktokens
- input price
- $2.00/1m tokens
- output price
- $8.00/1m tokens
- OpenAI o3-mini
openai/o3-mini
OpenAI o3-mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 200,000 tokens. The advertised input rate is $1.10 per million input tokens. The advertised output rate is $4.40 per million output tokens.
OpenAIText generation
- context
- 200ktokens
- input price
- $1.10/1m tokens
- output price
- $4.40/1m tokens
- OpenAI o4-mini
openai/o4-mini
OpenAI o4-mini is a text generation model from OpenAI, available through the Impossibl API. Its published context window is 200,000 tokens. The advertised input rate is $1.10 per million input tokens. The advertised output rate is $4.40 per million output tokens.
OpenAIText generationimage input
- context
- 200ktokens
- input price
- $1.10/1m tokens
- output price
- $4.40/1m tokens
- Text Embedding 3 Large
openai/text-embedding-3-large
Text Embedding 3 Large is a embedding model from OpenAI, available through the Impossibl API. Its published context window is 8,192 tokens. The advertised input rate is $0.13 per million input tokens.
OpenAIEmbeddings
- context
- 8.19ktokens
- input price
- $0.13/1m tokens
- output price
- $0.00/1m tokens
- Text Embedding 3 Small
openai/text-embedding-3-small
Text Embedding 3 Small is a embedding model from OpenAI, available through the Impossibl API. Its published context window is 8,192 tokens. The advertised input rate is $0.02 per million input tokens.
OpenAIEmbeddings
- context
- 8.19ktokens
- input price
- $0.02/1m tokens
- output price
- $0.00/1m tokens
compare OpenAI models
compare models with the same model type and billing unit. each comparison includes published api prices, context limits, and capabilities.
frequently asked questions
Which OpenAI models are available through Impossibl?
The directory lists 41 models from OpenAI available through the Impossibl API, including GPT Chat Latest, GPT-3.5 Turbo, and GPT-4 Turbo. Open each model page for its API identifier, capabilities, and current pricing.
How much do OpenAI models cost?
OpenAI model prices vary by model and usage. All rates below are published base API rates in USD. For token-priced models, published input rates start at $0.02 per million input tokens. Published output rates start at $0.30 per million output tokens. Input and output minima may refer to different models. For audio-duration models, published input rates start at $0.0045 per minute of audio. Long-context tiers can change prices for the whole request; check each model's thresholds and rates. Individual model pages include published cache prices and billing units. Applicable fees and workspace-specific pricing can affect the amount paid.
What context windows do OpenAI models support?
Among OpenAI models with a published limit on Impossibl, the largest context window is 1,050,000 tokens, listed for GPT-5.4, GPT-5.4 Pro, and GPT-5.5. Context limits vary by model and are separate from maximum output limits. Context windows are unpublished for 1 model.
What inputs and capabilities do OpenAI models support?
Available model types include embeddings, image generation, speech to text, and text generation. Published input support includes audio, image, and text; support varies by model. Tool-calling support is unspecified for 41 models.
How do I use OpenAI models through an API?
Use the exact model identifier from the model page with the Impossibl API. For example, select openai/chat-latest with /v1/chat/completions. Endpoint compatibility depends on the selected model. The API quickstart explains how to create an API key and send a request.