Model error diagnosis

OpenAI: GPT-5.1-Codex-Mini | model not found

OpenAI: GPT-5.1-Codex-Mini returning 404 / model not found means you should first confirm whether model ID openai/gpt-5.1-codex-mini is visible for this OpenAI key, then separate permission, context, capability, rate limit, or route issues.

Model

openai/gpt-5.1-codex-mini

OpenAI: GPT-5.1-Codex-Mini

Provider

OpenAI

62 models in catalog

Error type

model not found

model-not-found

Status code

404

global model route

Model error summary

Model

openai/gpt-5.1-codex-mini

Error type

model-not-found

Status code

404

Read-only check. Detection data burns after 5 minutes.

What this model error usually means

OpenAI: GPT-5.1-Codex-Mini returning 404 / model not found means you should first confirm whether model ID openai/gpt-5.1-codex-mini is visible for this OpenAI key, then separate permission, context, capability, rate limit, or route issues.

Model: openai/gpt-5.1-codex-mini
Provider: OpenAI
Status code: 404

How to prove it during checking

Read-only check. Detection data burns after 5 minutes.

List models: confirm whether openai/gpt-5.1-codex-mini is actually visible instead of guessing from the display name.
Light probe: use minimal input to verify whether OpenAI returns the same 404, then record the error body.
Compare model facts: context 400,000, input $0.250, output $2.
supports include_reasoning
supports max_completion_tokens
supports max_tokens
supports reasoning

Next action

OpenAI: GPT-5.1-Codex-Mini model not found should not end at failed. Return the next move: change model ID, add permission, reduce context, disable unsupported capability, change route, monitor, or hold listing.

Context: 400,000
Price: $0.250 / $2
Read-only check. Detection data burns after 5 minutes.

Open key checker

Read-only check. Detection data burns after 5 minutes.

Open models

OpenAI: GPT-5.1-Codex-Mini

Open providers

OpenAI