GPT-5.4 Pro
GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs. Optimized for step-by-step reasoning, instruction following, and accuracy, GPT-5.4 Pro excels at agentic coding, long-context workflows, and multi-step problem solving.
Context window
This model accepts 1.1M tokens in one request (~788K words of text).
What fits in one request
- FitsShort documentAbout 1,500 words of text
- FitsLong documentAbout 37K words of text
- FitsSmall codebaseAbout 150K words of text
- FitsFull novelAbout 375K words of text
Specifications
Context size, pricing, and release info in one place.
- Context window
- 1,050,000 tokens (1.1M)
- Max output tokens
- 128,000 tokens (128K)
- Speed tier
- balanced
- Provider
- Openai
- Release date
- Mar 2026
Capabilities
See which features this model supports, such as vision, tools, and streaming.
- Vision
- Accepts image inputs alongside text
- Supported
- Tool use
- Can call external tools and APIs
- Supported
- Function calling
- Structured function call interface
- Supported
- Extended thinking
- Shows its chain-of-thought reasoning
- Supported
- Streaming
- Returns tokens as they are generated
- Supported
- Web search
- Can browse the web during a request
- Not supported
- Batch API
- Process many requests asynchronously
- Not supported
- Prompt caching
- Reuse repeated prompt prefixes cheaply
- Not supported
Best for
Jump to a guide or ranking that matches each workload.
Compare GPT-5.4 Pro
Open a side-by-side comparison with one click.
- GPT-5.4 Pro vs Amazon Titan Text Express
GPT-5.4 Pro has 2400% larger context window
- GPT-5.4 Pro vs Amazon Titan Text Lite
GPT-5.4 Pro has 2400% larger context window
- GPT-5.4 Pro vs Amazon Titan Text Premier
GPT-5.4 Pro has 2400% larger context window
- GPT-5.4 Pro vs Claude Instant
GPT-5.4 Pro has 950% larger context window
- GPT-5.4 Pro vs Anthropic Claude
GPT-5.4 Pro has 950% larger context window
- GPT-5.4 Pro vs Codellama 34b Instruct
GPT-5.4 Pro has 25534% larger context window
Frequently asked questions
Short answers about context size and how this model behaves.
More from Openai
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