OpenAI: GPT-5.2-Codex
The OpenAI GPT-5.2-Codex model is designed for various applications that require text and image input modalities. It can process lengthy contexts of up to 400,000 tokens and generate output with a maximum of 128,000 completion tokens. The model supports tools and reasoning capabilities, but its structured output is not specified. This model may be worth considering for developers who prioritize processing complex inputs or require the ability to reason over text and image data. Its price point, however, might be a deterrent at $1.75 per million input tokens and $14.00 per million output tokens. With a blended benchmark score of 49.8 across one independent benchmark, users should weigh its performance against the cost before shortlisting it for their project needs.
Benchmark results
Independent, published benchmarks. Blended score 45.9 across 1 benchmark, last refreshed 2026-09-27. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 47.0 |
- Model ID
- openai/gpt-5.2-codex
- Vendor
- openai
- Released
- January 2026
- Tokenizer
- GPT
- Input Modalities
- text, image
- Output Modalities
- text
- Max Output
- 128,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $1.75/M input and $14.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.07 |
| Classify 1,000 customer emails | 500k in / 50k out | $1.58 |
| A month of a busy support chatbot | 5M in / 2M out | $36.75 |
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Quick answers
- How much does OpenAI: GPT-5.2-Codex cost?
- $1.75 per million input tokens and $14.00 per million output tokens.
- What is OpenAI: GPT-5.2-Codex's context window?
- 400,000 tokens, roughly 600 pages of text in a single request.
- Does OpenAI: GPT-5.2-Codex support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: GPT-5.2-Codex process images?
- Yes, it accepts image input.