Openai/Gpt 5.1 Codex Max
Openai/Gpt 5.1 Codex Max is available via OpenRouter with a 400K context window and up to 128,000 output tokens. Pricing: $1.25/1M input tokens, $10.00/1M output tokens.
Openai/Gpt 5.1 Codex Max Pricing & Specifications
What is Openai/Gpt 5.1 Codex Max?
Openai/Gpt 5.1 Codex Max is a large language model by OpenRouter with a 400K context window and up to 128,000 output tokens. It costs $1.25 per 1M input tokens and $10.00 per 1M output tokens. Openai/Gpt 5.1 Codex Max is available via OpenRouter with a 400K context window and up to 128,000 output tokens. Pricing: $1.25/1M input tokens, $10.00/1M output tokens.
Capabilities
text vision function calling reasoning
Openai/Gpt 5.1 Codex Max Cost Examples
Short prompt (500 tokens)
$0.000625
Medium prompt (2K tokens)
$0.00250
Long output (4K tokens)
$0.04000
Count tokens for Openai/Gpt 5.1 Codex Max
Paste your prompt to see exact token counts and API cost estimates.
Open Token CounterSimilar Models to Openai/Gpt 5.1 Codex Max
Frequently Asked Questions
How much does Openai/Gpt 5.1 Codex Max cost per token? +
Openai/Gpt 5.1 Codex Max costs $1.25 per 1M input tokens and $10.00 per 1M output tokens. For a typical 1,000-token request with a 500-token response, that works out to roughly $0.006250.
What is the context window for Openai/Gpt 5.1 Codex Max? +
Openai/Gpt 5.1 Codex Max supports a context window of 400,000 tokens (400K). This determines the maximum combined length of your prompt and conversation history in a single API call.
What is the maximum output length for Openai/Gpt 5.1 Codex Max? +
Openai/Gpt 5.1 Codex Max can generate up to 128,000 tokens in a single response. If you need longer outputs, you can make multiple API calls and concatenate the results.
Is Openai/Gpt 5.1 Codex Max good for coding tasks? +
Yes, Openai/Gpt 5.1 Codex Max supports capabilities well-suited for coding tasks including code generation, debugging, and refactoring.