Model error diagnosis

OpenAI: GPT-4.1 Nano | model capability unsupported

OpenAI: GPT-4.1 Nano returning 400 / model capability unsupported means you should first confirm whether model ID openai/gpt-4.1-nano is visible for this OpenAI key, then separate permission, context, capability, rate limit, or route issues.

Model

openai/gpt-4.1-nano

OpenAI: GPT-4.1 Nano

Provider

OpenAI

62 models in catalog

Error type

model capability unsupported

capability-unsupported

Status code

400

global model route

Model error summary

Model

openai/gpt-4.1-nano

Error type

capability-unsupported

Status code

400

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

What this model error usually means

OpenAI: GPT-4.1 Nano returning 400 / model capability unsupported means you should first confirm whether model ID openai/gpt-4.1-nano is visible for this OpenAI key, then separate permission, context, capability, rate limit, or route issues.

Model: openai/gpt-4.1-nano
Provider: OpenAI
Status code: 400

How to prove it during checking

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

List models: confirm whether openai/gpt-4.1-nano is actually visible instead of guessing from the display name.
Light probe: use minimal input to verify whether OpenAI returns the same 400, then record the error body.
Compare model facts: context 1,047,576, input $0.100, output $0.400.
supports max_completion_tokens
supports max_tokens
supports response_format
supports seed

Next action

OpenAI: GPT-4.1 Nano model capability unsupported 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: 1,047,576
Price: $0.100 / $0.400
Read-only check. Detection data burns after 5 minutes.

Open key checker

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