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Only 258k context in codex - Codex

Quick fix

Once cc-switch maps a minimax model onto gpt-5.5, the hard-coded Codex and Claude Code context limits apply and the 1M context is lost.

Symptom

Section titled “Symptom”
Error output
codex中只有258k上下文
English translation

Only 258k context in codex

Cause

Section titled “Cause”

When you declare a 1M context for minimax or a similar model in cc-switch, the tool may map it onto a built-in model name such as gpt-5.5 for client compatibility. But Codex hard-codes a 258k context limit for gpt-5.5, and the newest Claude Code limits it to 200k and removed the 1M option, so the client truncates the context regardless. The cluster also mixes in a stack buffer overflow error when resizing the Windows terminal (unrelated to cc-switch) and questions from a macOS user about the preset screen.

Fix

Section titled “Fix”

  1. Confirm the client limit: Codex and the newest Claude Code hard-code a context ceiling for specific models such as gpt-5.5, which declaring 1M in cc-switch alone cannot break through.

  2. Claude Code users, downgrade: since older versions had a 1M context model option, try downgrading Claude Code Desktop to a version from before this problem.

  3. Codex users, change the mapping or wait for an update: to use the native minimax 1M context, avoid model names the client hard-codes a limit for, or wait for Codex to lift the limit officially.

Affected Versions

Section titled “Affected Versions”
ToolCodex
Version3.14.1 - 3.16.3 (受影响范围)
PlatformsWindowsmacOS

Source Issues

Section titled “Source Issues”

This page is distilled from 3 real issues

FAQ

Section titled “FAQ”
So because ccs mapped my model onto gpt-5.5, and gpt-5.5 itself only has 258k, I cannot use the native 1M context of minimax-m3?
Yes. Codex hard-codes a 258k limit for gpt-5.5, which overrides the 1M context declared in cc-switch.
Where does the minimax on the mac-os preset screen come from?
It is one of the presets cc-switch provides, to help you connect the minimax API quickly.
Launching the command line with the minimaxAPI, running a command and then resizing the terminal errors. Is that related to cc switch?
Maintainers confirmed that terminal stack buffer overflow error is unrelated to cc-switch — it is a low-level problem in the system terminal or runtime environment.
Section titled “Related problems”
No plan shown (parsed as empty)Upgrade CC Switch to the latest version, or change the filter in your custom script from TOKENS_LIMIT to CREDIT_LIMIT for the new Zhipu credit-based API.7 issues mergedInstalled but cannot run in current environment, please check CC SwitchUpgrade to CC Switch v3.16.1+ to fix Windows `cmd /C` quote handling that misreports installed CLI as broken.1 issues mergedAdd CoderPlan provider preset for Claude CodeFeature request: add a CoderPlan provider preset to cc-switch. A Claude Code preset PR exists, but merge status is unconfirmed.1 issues merged

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