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Models

GPT-5.2

By OpenAI. Unknown parameters, a context window of 400,000 tokens, licence Unknown.

Facts

Released
2025-12-11 the release date models.dev records models.dev, read
Licence
Unknown
Open weights
No models.dev records whether the weights are open models.dev, read
Parameters
Unknown
Active parameters
Unknown
Knowledge cutoff
2025-08-31 the knowledge cutoff models.dev records models.dev, read
Context window
  • 400,000 tokens the context length OpenRouter lists OpenRouter, read
  • 400,000 tokens the context limit models.dev records for the maker's own API models.dev, read
Longest output
  • 128,000 tokens the largest output OpenRouter's first provider allows OpenRouter, read
  • 128,000 tokens the output limit models.dev records for the maker's own API models.dev, read
Tool calling
  • Yes OpenRouter lists tools among the supported parameters OpenRouter, read
  • Yes models.dev records tool_call as true models.dev, read
Structured output
  • Yes OpenRouter lists structured outputs among the supported parameters OpenRouter, read
  • Yes models.dev records structured_output as true models.dev, read
Reasoning controls
  • Yes OpenRouter lists reasoning controls, with the efforts xhigh, high, medium, low, none OpenRouter, read
  • Yes models.dev records reasoning as true models.dev, read
Inputs and outputs
file, image, text in, text out OpenRouter, read
Good for
  • Reasoning: OpenRouter lists reasoning controls for it OpenRouter, read
  • Vision: OpenRouter lists images among its inputs OpenRouter, read

Prices

Prices in US dollars per million tokens, as each source lists them
ProviderInputOutputContextAs ofSource
OpenAI through OpenRouter0.875 USD7.00 USD400,000OpenRouter endpoints, read
OpenAI through OpenRouter0.875 USD7.00 USD400,000OpenRouter endpoints, read
Azure through OpenRouter1.75 USD14.00 USD400,000OpenRouter endpoints, read
Azure through OpenRouter1.75 USD14.00 USD400,000OpenRouter endpoints, read
OpenAI direct1.75 USD14.00 USD400,000 older than 30 days; check the providermodels.dev, read
OpenAI through OpenRouter1.75 USD14.00 USD400,000OpenRouter endpoints, read
OpenAI through OpenRouter1.75 USD14.00 USD400,000OpenRouter endpoints, read
OpenAI through OpenRouter3.50 USD28.00 USD400,000OpenRouter endpoints, read
OpenAI through OpenRouter3.50 USD28.00 USD400,000OpenRouter endpoints, read

Run it on your own hardware

No source lists weight files or a parameter count for this model, so its memory needs are Unknown.

Use it from your harness

Set up for OpenAI with the model gpt-5.2. Each endpoint page has the same setup for its own address.

OpenCode

Put this in opencode.json in your project folder:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "openai": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "OpenAI",
      "options": {
        "baseURL": "https://api.openai.com/v1",
        "apiKey": "{env:OPENAI_API_KEY}"
      },
      "models": {
        "gpt-5.2": {
          "name": "GPT-5.2",
          "limit": {
            "context": 400000,
            "output": 128000
          }
        }
      }
    }
  }
}
  • OpenCode reads any OpenAI-compatible address through the @ai-sdk/openai-compatible package, and an address that speaks the Responses API through @ai-sdk/openai.

From OpenCode documentation, read .

Pi

Put this in ~/.pi/agent/models.json:

{
  "providers": {
    "openai": {
      "baseUrl": "https://api.openai.com/v1",
      "api": "openai-completions",
      "apiKey": "$OPENAI_API_KEY",
      "models": [
        {
          "id": "gpt-5.2"
        }
      ]
    }
  }
}
  • The apiKey field can name an environment variable as $NAME.

From Pi documentation, read .

Codex

Put this in ~/.codex/config.toml:

model = "gpt-5.2"
  • Codex speaks the Responses API only: responses is the one supported wire API of a custom provider. Ollama and LM Studio are built in and start with --oss.

From Codex documentation, read .

Claude Code

Claude Code sends Anthropic Messages requests, and OpenAI documents no such address. A gateway that translates to that API can sit in between.

  • Claude Code sends Anthropic Messages requests to ANTHROPIC_BASE_URL. Anthropic says it does not support routing Claude Code to models other than Claude through any gateway, so some features may not work with another model.

From Claude Code documentation, read .

Other ways to reach it