Model detail
gpt-5.4-2026-03-05
GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling high-context reasoning, coding, and multimodal analysis within the same workflow. The model delivers improved performance in coding, document understanding, tool use, and instruction following. It is designed as a strong default for both general-purpose tasks and software engineering, capable of generating production-quality code, synthesizing information across multiple sources, and executing complex multi-step workflows with fewer iterations and greater token efficiency.
Model specs
- Context length
- 1.05M
- Max output
- 128K
- I/O modalities
- Text / Image
- Released
- 2026-03
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API endpoints
One MixRoute gateway, OpenAI-compatible
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OpenAI-compatible
/v1/chat/completionsPOST
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Tiered pricing
Unit: /1M Tokens
| Tier | Input /1M Tokens | Output /1M Tokens | Cache read /1M Tokens |
|---|---|---|---|
| standard Length ≤ 272K | $2.5000 | $15.0000 | $0.2500 |
| long_context Length > 272K | $5.0000 | $22.5000 | $0.5000 |
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Selection summary
Quickly judge whether it fits your workload
What is this model good for?
1M+ context window with text and image inputs
Use gpt-5.4-2026-03-05 for high-context reasoning, coding, and multimodal analysis. It unifies the Codex and GPT lines with a 922K input, 128K output context window.
What should you check before using it?
Confirm the snapshot date matches your stability needs
This is the 2026-03-05 snapshot of GPT-5.4. Verify that this version provides the stability you need. Test coding, document understanding, and multi-step workflows.
Why use it through MixRoute?
Use the OpenAI-compatible endpoint with stable model ID
Use the confirmed compatible endpoint with model ID gpt-5.4-2026-03-05 through MixRoute for a pinned version.
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Token cost estimator
Live estimate from this page's pricing, not an actual bill
Share of the same prefix read repeatedly, up to 100%
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FAQ
gpt-5.4 is a frontier general-purpose model for complex reasoning, coding, document understanding, tool use, and multi-step workflows. It is intended to serve as a capable default when one model must cover varied professional tasks.
One endpoint, a testable decision
Test this model and alternate routes with the same request format
Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.