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There's an issue with the selected model - Claude Code

Quick fix

Enable local proxy and rectifier, and correctly set ANTHROPIC_BASE_URL to resolve NVIDIA or MiniMax model call failures.

Symptom

Section titled “Symptom”
Error output
There's an issue with the selected model (minimaxai/minimax-m2.5[1m]). It may not exist or you may not have access to it. Run --model to pick a different model.

Cause

Section titled “Cause”

When using third-party proxies like NVIDIA NIM API or MiniMax, if the model mapping is not correctly read by the local proxy, Claude Code will prompt that the model does not exist or lacks permission. This is usually because the local proxy takeover is not enabled, the rectifier (NVIDIA API does not support Anthropic's prompt_cache_key parameter) is not enabled, or the environment variable ANTHROPIC_BASE_URL does not correctly point to the proxy port.

Fix

Section titled “Fix”

  1. Ensure local proxy is enabled in cc-switch to take over Claude.

  2. Enable 'Rectifier' in advanced settings to automatically filter out the prompt_cache_key parameter unsupported by NVIDIA API.

  3. Select the API format as OpenAI chat completions.

  4. If errors persist after interface configuration, manually export the environment variable in the terminal before starting Claude Code: export ANTHROPIC_BASE_URL="http://127.0.0.1:代理端口".

  5. It is recommended to update cc-switch to v3.12.3 or higher, which includes multiple compatibility improvements.

Affected Versions

Section titled “Affected Versions”
Toolclaude-code
Version3.11 - 3.12.0
PlatformsWindowsmacOSLinux

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”
What should I do if I still get a 502 error after manually setting ANTHROPIC_BASE_URL in the terminal?
Please check if the proxy port is correct and confirm that the NVIDIA NIM or corresponding provider's API service is currently available. Additionally, try switching to other models to rule out model name mapping errors (e.g., some users noted that minimax-m2.5 might not have a 1m version).
Section titled “Related problems”
Low cache hit rate around 40% and very slow responses in Claude CodeSet CLAUDE_CODE_ATTRIBUTION_HEADER to false in .claude/settings.json to stop dynamic headers from breaking third-party model prompt caching.1 issues mergedcc-switch DeepSeek usage statistics inaccurate / balance query failsUpgrade to v3.19.2 and rebuild Codex usage. The balance query needs a correct {{apiKey}}, or a proxy.17 issues mergedCodex conversation history disappears after switching providerAfter upgrading to v3.16.0 or above, CC Switch automatically migrates third-party provider history into the custom bucket; original files are backed up.2 issues merged

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