GPT-6 Luna Decisions vs Julia 1
rates, context and capabilities side by side on the impossibl api, and what the same workload costs on each.
| specification | GPT-6 Luna Decisions openai/gpt-6-luna-decisions | Julia 1 supersoniclabs/julia-1 |
|---|---|---|
| input · usd / 1m tok | $0.10 | $0.025 |
| output · usd / 1m tok | $0.00 | $0.00 |
| context window | 1.05mtokens | 8.19ktokens |
| modalities · in → out | takes text and image in, gives typed answers out | takes text in, gives typed answers out |
pricing
| base api rates · usd per 1m tokens | GPT-6 Luna Decisions openai/gpt-6-luna-decisions | Julia 1 supersoniclabs/julia-1 |
|---|---|---|
| input | $0.10over 272k · $0.20 | $0.025 |
| output | $0.00over 272k · $0.00 | $0.00 |
brackets are by input tokens per request: a request over a threshold is billed at that bracket's rates for all of its tokens. cache creation can have a separate charge. a shared cost estimate needs models of one type with token pricing; compare the published rates and billing units here.
specifications
| as published | GPT-6 Luna Decisions openai/gpt-6-luna-decisions | Julia 1 supersoniclabs/julia-1 |
|---|---|---|
| creator | OpenAI | Supersonic Labs |
| model type | Evaluation | Evaluation |
| context window | 1,050,000tokens | 8,192tokens |
| input | takes text and image in, gives typed answers out | takes text in, gives typed answers out |
| output | typed answers with probabilities | typed answers with probabilities |
| tool calling | not supported | not supported |
| released | oct 6, 2026 | sep 23, 2026 |
| endpoint | /v1/decisions | /v1/systemone |
unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.
summary
GPT-6 Luna Decisions and Julia 1 are available through the Impossibl API.
GPT-6 Luna Decisions is created by OpenAI. It has a 1,050,000-token context window. Base API pricing (USD): $0.10 per million input tokens; $0.00 per million output tokens. Above 272,000 input tokens per request, context-tier rates apply to the whole request.
Julia 1 is created by Supersonic Labs. It has a 8,192-token context window. Base API pricing (USD): $0.025 per million input tokens; $0.00 per million output tokens.
GPT-6 Luna Decisions →Julia 1 →
this page compares GPT-6 Luna Decisions vs Julia 1 as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes.
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