add gpt5 models to models without temperature support

[dzmitryashkinadze]

User description

Hi all,

This patches this issue: #1985

A bit more context on this:
I am running pr-agent 0.3.0
Model" gpt-5.1-codex-mini

the "improve" tool was failing with following error:
Error during LLM inference: litellm.BadRequestError: OpenAIException - Unsupported value: 'temperature' does not support 0.2 with this model. Only the default (1) value is supported.

and following warnings were present even after I would set config__temperature=1:
2025-11-20 12:58:29.977 | WARNING | pr_agent.algo.ai_handlers.litellm_ai_handler:chat_completion:378 - Error during LLM inference: litellm.BadRequestError: OpenAIException - Unsupported value: 'temperature' does not support 0.2 with this model. Only the default (1) value is supported.

I did trace it to this list https://github.com/qodo-ai/pr-agent/blob/main/pr_agent/algo/__init__.py#L185 and if the model was added there the "improve" tool would work

PS I think all gpt-5 series models do not support temperature anymore (gpt-5, gpt-5-mini, gpt-5.1-codex, gpt-5.1-codex-mini, the list goes on)

Best, Dzmitry

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PR Type

Bug fix

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Description

• Add GPT-5 series models to temperature-unsupported list

• Fixes LLM inference errors when using gpt-5.1-codex variants

• Prevents temperature parameter from being sent to incompatible models

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Diagram Walkthrough

flowchart LR
  A["GPT-5 Models<br/>gpt-5.1-codex<br/>gpt-5.1-codex-mini<br/>gpt-5-mini"] -- "Added to" --> B["NO_SUPPORT_TEMPERATURE_MODELS"]
  B -- "Prevents" --> C["Temperature Parameter<br/>Errors"]

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File Walkthrough

	Relevant files
Bug fix	__init__.py Add GPT-5 models to temperature-unsupported list                  pr_agent/algo/init.py Added three GPT-5 series models to NO_SUPPORT_TEMPERATURE_MODELS list Models added: gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5-mini Resolves BadRequestError when improve tool attempts to set temperature parameter +3/-0

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[qodo-merge-for-open-source]

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🟡	🎫 #1985 🔴 Update max token configuration for model gpt-5-mini Fix the error "Ensure gpt-5-mini is defined in MAX_TOKENS in ./pr_agent/algo/__init__.py or set a positive value for it in config.custom_model_max_tokens" Resolve the failure to generate code suggestions for PR with gpt-5-mini model
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[qodo-merge-for-open-source]

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