max_tokens must be at least 1, got -1712 — Codex

Quick fix

The original post only suggested a lower-bound check for max_tokens; no verified fix or user-usable configuration is available.

Symptom

Error outputCopy

CC Switch local proxy failed while handling Codex endpoint /responses.
Provider: NVIDIA GPT-OSS 120B; model: openai/gpt-oss-120b;
upstream_status: HTTP 400;
cause: max_tokens must be at least 1, got -1712.
(parameter=max_tokens, value=-1712)

Cause

The report states that when Codex sends requests through the `/responses` endpoint, CC Switch converts them to `/chat/completions`; `max_output_tokens` is mapped to `max_tokens` without validating that it is positive. The report observed that the negative value changed after restarts, suggesting a dynamic calculation or overflow issue rather than a fixed configuration error.

The original post suggested falling back to the provider default or a fixed positive value when `max_tokens` is below 1 before forwarding, and adding a forced override option in the Provider UI. These are reporter suggestions only; there is no maintainer confirmation, merged change, or successful user verification. The issue was automatically closed after prolonged inactivity, so it cannot be considered fixed.

Fix

1. 1

   The original post does not provide a verifiable solution. You can follow or reopen Issue #4714 and provide maintainers with the actual negative `max_tokens` value seen in the Codex `/responses` request. The proposed lower-bound check is only a suggestion and has not been confirmed as implemented.

Affected Versions

ToolCodex

Versionv3.16.4（报告受影响）

PlatformsUnknown

Source Issues

This page is distilled from 1 real issues

• #4714Codex /responses endpoint: max_tokens calculated as negative number (e.g. -213, -1712)

FAQ

(No FAQ yet)

Related problems

Unable to Call Tools Normally with Claude CodeModel responses vary on the NVIDIA channel; try deepseek-ai/deepseek-v4-flash, which was tested as stable, or switch providers.2 issues merged401 UnauthorizedUpgrade to cc-switch 4.0.x, or clear the stale third-party OPENAI_API_KEY from ~/.codex/auth.json manually, restart Codex, and sign in again with ChatGPT OAuth.2 issues mergedapi failed deserialize json body intoDepending on the error: roll Claude Code back, upgrade cc-switch, turn the local proxy off, or stop sending unsupported fields.8 issues merged