OpenAI: gpt-4.1:free
gpt-4.1 is the flagship variant of OpenAI's GPT-4.1 family, officially designated as the "Smartest non-reasoning model." It marks a significant advancement over GPT-4o, with substantial improvements in coding reliability and instruction-following precision. Its standout technical breakthrough is the 1-million-token context window, enabling the processing of entire monorepos, extensive legal documents, or massive event logs in a single pass. The model is trained for high "literal adherence," following complex formatting and logic far more accurately than its predecessors. It also introduces optimized code-diffing capabilities, allowing for precise edits that reduce both cost and latency for developers.
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Supported parameters
All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.
| Parameter | Providers | Default |
|---|---|---|
| max_completion_tokens | All providers | - |
| max_tokens | Some providers | - |
| response_format | All providers | - |
| seed | All providers | - |
| structured_outputs | All providers | - |
| temperature | All providers | - |
| tool_choice | All providers | - |
| tools | All providers | - |
| top_p | All providers | - |