GPT-6.1 Sol

GPT-6.1 Sol is OpenAI's near-flagship model, released a week after GPT-6 Sol and aimed at agentic coding, computer use and other demanding professional work.

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input · usd / 1m tok

$2.00

output · usd / 1m tok

$10.00

context window

1.05mtokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $2.00over 272k · $4.00
output: $10.00over 272k · $15.00
cache read: $0.10over 272k · $0.20
cache write · default ttl: $2.50over 272k · $5.00

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.

providers

Different companies host GPT-6.1 Sol. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

Azure AI Foundry
OpenAI

specifications

takes text and image in, gives text outopenai/gpt-6.1-sol

creatorOpenAI
model typeText generation
context window1,050,000 tokens
maximum outputnot published
input
takes text and image in, gives text out
outputtext
tool callingnot verified
releasedsep 29, 2026
endpoint/v1/chat/completions

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.

try it · your prompt, this model, live

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="openai/gpt-6.1-sol",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="openai/gpt-6.1-sol",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

benchmarks

intelligence index

51.8#7 of 105 models on the gateway

Intelligence Index51.83
legal index (API)57.7
economics index (API)59.3
engineering index (API)53.9
intelligence index (API)51.8
strategy and ops index (API)57
finance and accounting index (API)54
healthcare and medical index (API)51.2

view source ↗all source data and breakdowns (json) ↗

each configuration is listed separately; these evaluations describe the tested model configuration, and performance and costs can differ on impossibl. unmeasured scores are omitted and api values keep their source units. last checked 2026-10-14.

compare GPT-6.1 Sol with other models

frontier labs and open weights, best-ranked firstusd / 1m tok · in / out

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frequently asked questions

What is GPT-6.1 Sol?

GPT-6.1 Sol is OpenAI's near-flagship model, released a week after GPT-6 Sol and aimed at agentic coding, computer use and other demanding professional work. OpenAI positions it as delivering close to GPT-6 Astra's quality at a fraction of Astra's token prices, and it reasons on a narrower effort ladder than its predecessor.

How much does GPT-6.1 Sol cost?

GPT-6.1 Sol costs $2.00 per million input tokens and $10.00 per million output tokens through the Impossibl API. Cache reads cost $0.10 per million tokens; cache writes cost $2.50 per million tokens. These base rates apply through 272,000 total input tokens per request. Above 272,000 input tokens, the long-context rates in the pricing table apply to the whole request. All rates are in USD.

view the pricing table ↑

What is the context length of GPT-6.1 Sol?

GPT-6.1 Sol has a 1,050,000-token context window through the Impossibl API.

What inputs and outputs does GPT-6.1 Sol support?

GPT-6.1 Sol accepts text and image as input. GPT-6.1 Sol returns text.

How do I use GPT-6.1 Sol through an API?

GPT-6.1 Sol is available through the Impossibl API. Use openai/gpt-6.1-sol as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was GPT-6.1 Sol released?

OpenAI released GPT-6.1 Sol on September 29, 2026.

Creator release announcement ↗

this page describes GPT-6.1 Sol 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. model descriptions and release dates, where available, use the creator sources linked under the answers above.

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