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OpenAI

GPT-5.4

mainstreamClosed

GPT-5.4 is OpenAI's latest frontier model, unifying the Codex and GPT lines into a single system. It offers a 1M+ token context window with 922K input and 128K output capacity, supporting long-document and large-codebase workloads. Priced at 2.5 USD per million input tokens and 15.0 USD per million output tokens, it targets demanding coding, reasoning, and agentic tasks within a unified architecture.

API Pricing

Input

$2.5

Output

$15

Cached input

—

Peak hours

—

USD / 1M tokens

※ Verified via OpenRouter live pricing (2026-11-02): $2.5 input / $15.0 output per million tokens.

Specifications

Context window
1.1M Tokens
Max output
—
Input modalities
Text
License
Closed

Capabilities & use cases

Key capabilities

  • Unified Codex and GPT architecture
  • 1M+ token context window
  • 922K input and 128K output capacity
  • OpenAI frontier model generation
  • Long-context document and code handling

Best for

  • Large-codebase development
  • Long-document analysis
  • Agentic workflows
  • Complex reasoning tasks

Official links

Website ↗API platform ↗Pricing page ↗Open in comparator ↗

Same vendor

GPT-6.1 SolGPT-6 AstraGPT-5.6 LunaGPT-5.6 SolGPT-6 LunaGPT-5.6 Terra

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FAQ

What does GPT-5.4 cost?
GPT-5.4 is priced at $15 output and $2.5 input (USD per 1M tokens)
How large is the context window of GPT-5.4?
GPT-5.4 has a 1.1M Tokens context window with up to — output.
Where can I access GPT-5.4?
Official channels: Website and API platform.

Data is refreshed daily and cross-checked against two independent sources; please confirm pricing and specs on the vendor page.