GPT-6.1 Sol
GPT-6.1 Sol targets coding and other complex professional tasks. A useful distinction is that its API capability does not imply the same context setting or billing rules inside an OpenAI subscription product.
Check the endpoint before moving an existing agent
Sol’s documentation requires the Responses API for tool calls. A migration that only replaces a model ID can therefore leave an older tool loop incomplete.GPT-6.1 Sol model reference
The speed setting is also a price setting
Fast processing costs twice Standard; Ultrafast costs six times Standard. Batch and Flex are half the Standard rate. API prompts above 272,000 input tokens incur a full-request long-context adjustment; subscription usage follows separate rules.GPT-6.1 Sol model reference
Compare a finished change, not only generated code
Practical guidance. For a code maintenance task, give the model the failure, relevant source and acceptance conditions. Compare whether the change preserves existing behavior and whether its explanation identifies remaining uncertainty. Include human review time when judging the result.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | gpt-6.1-sol |
| Context window | 1,050,000 tokens API context limit GPT-6.1 Sol model reference |
| Context window | 500,000 tokens Default in Codex and ChatGPT Work GPT-6.1 Sol model reference |
| Maximum output | 128,000 tokens Maximum API output GPT-6.1 Sol model reference |
| Input price | 2 USD per million tokens Standard text input; up to 272,000 input tokens GPT-6.1 Sol model reference |
| Output price | 10 USD per million tokens Standard text output; up to 272,000 input tokens GPT-6.1 Sol model reference |
| Tool calls | Use the Responses API for tool calling.GPT-6.1 Sol model reference |
| Default reasoning effort | mediumGPT-6.1 Sol model reference |
| Input and output | Text and images in; text outGPT-6.1 Sol model reference |
| Maximum input | 922,000 tokens within the total context window.GPT-6.1 Sol model reference |
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