gpt-5-4
Overview
GPT-5.4 is OpenAI's frontier model released on March 5, 2026, and the first mainline model to unify reasoning, coding (GPT-5.3-Codex), and computer use into a single architecture. With up to 1,050,000 tokens of context and 128,000 tokens of max output, it is designed for advanced, broad-scope workflows.
Key Features
- Unified Architecture: Merges reasoning, coding, and computer use into one model — no need to switch between specialized models.
- Configurable Reasoning Effort: Five discrete reasoning levels (none, low, medium, high, xhigh) let developers control thinking depth and cost per query.
- Computer Use API: A new Computer Use API enables the model to see screens, move cursors, click elements, type text, and interact with desktop applications.
- Tool Search: Deferred tool loading mechanism that fetches tool definitions only when needed, reducing total token usage by 47% while maintaining the same accuracy.
- 1M+ Context Window: Supports up to 1,050,000 tokens of context (922K input + 128K output), enabling analysis of entire codebases or document collections in a single request.
Best Use Cases
- Agentic Coding Assistants: Scores 57.7% on SWE-Bench Pro, ideal for complex multi-step coding tasks and autonomous code repair.
- Desktop Automation & RPA: OSWorld score of 75% surpasses the human expert baseline of 72.4%, suitable for browser navigation, form filling, and desktop application control.
- Knowledge-Intensive Work: GDPval score of 83% with 33% fewer factual errors per claim than GPT-5.2, ideal for research analysis, document processing, and professional Q&A.
- Long-Context Analysis: The 1M token context window is perfect for legal document review, large-scale code audits, and cross-document correlation analysis.
Capabilities and Limitations
| Capability | Detailed Description |
|---|---|
| Reasoning Ability | SWE-Bench Pro 57.7%, SWE-Bench Verified ~80%, high GPQA Diamond scores, with five configurable reasoning levels. |
| Creative Ability | Excellent long-form text and code generation with 128K max output supporting whole-project generation. |
| Multimodal Ability | Supports text and image input with text output; MMMU Pro score of 81.2%. |
| Response Speed | As a flagship model, moderate inference speed; higher latency in xhigh reasoning mode, near real-time in none mode. |
| Context Window | Standard 272K tokens; expandable to 1,050,000 tokens (requires explicit configuration). |
| Max Output | 128,000 tokens |
| Knowledge Cutoff | August 31, 2025 |
Standard Pricing
The token prices below are shown in USD per 1 million tokens; web search is billed in USD per use.
| Model | Input (USD / 1M Tokens) | Cache Write (USD / 1M Tokens) | Cache Read (USD / 1M Tokens) | Output (USD / 1M Tokens) | Web Search (USD / use) |
|---|---|---|---|---|---|
| GPT-5.4 | $2.50 | $2.50 | $0.25 | $15.00 | $0.01 |
Credits settlement: B.AI converts charges at 1 USD = 1,000,000 Credits and deducts Credits from the account balance.
Prices shown in the documentation are B.AI standard reference prices for base billing purposes. B.AI may provide lower actual usage costs through top-up bonuses and account benefits. Specific prices, bonus Credits, and account benefits are subject to the platform display and final billing records.