Technical Specifications of GPT-5.4-2026-03-05
| Item | GPT-5.4-2026-03-05 |
|---|---|
| Model family | GPT-5 |
| Provider | OpenAI |
| Release date | March 5, 2026 |
| Model type | Snapshot version |
| Context window | 1,050,000 tokens |
| Max output tokens | 128,000 |
| Input types | Text, Image |
| Output types | Text |
| Audio | Not supported |
| Reasoning controls | none, low, medium, high, xhigh |
| Tool support | Web search, File search, Code interpreter, Image generation |
| Knowledge cutoff | Aug 31, 2025 |
| Snapshot stability | Locked model behavior |
What is GPT-5.4-2026-03-05?
GPT-5.4-2026-03-05 is the first stable snapshot release of OpenAI’s GPT-5.4 frontier model, optimized for complex professional workflows including research, coding, data analysis, and agent-style automation.
Unlike the alias gpt-5.4, the snapshot version guarantees consistent behavior across deployments, which is critical for production systems, evaluation pipelines, and enterprise software integrations.
GPT-5.4 also introduces stronger reasoning performance, expanded tool integration, and a 1M+ token context window, enabling multi-document reasoning and long-horizon tasks.
Main Features of GPT-5.4-2026-03-05
- 1.05M token context window allowing analysis of extremely large datasets or document collections.
- Configurable reasoning effort levels to balance speed vs deep reasoning.
- Native tool orchestration including web search, file retrieval, and code interpreter.
- Improved professional task accuracy, particularly for coding and research workflows.
- Agent-style workflows with support for multi-step tool usage and automation.
- Snapshot stability for production, ensuring deterministic model behavior across deployments.
Benchmark Performance
While OpenAI has not released full public benchmark tables yet, GPT-5.4 demonstrates:
- ~33% reduction in factual errors compared to GPT-5.2
- Improved reasoning and coding capabilities for professional workflows
- Increased reliability in multi-step tool execution and long-context reasoning
These improvements position GPT-5.4 as OpenAI’s most capable API model for enterprise AI applications.
GPT-5.4 vs Comparable Models
| Model | Context Window | Key Strength |
|---|---|---|
| GPT-5.4-2026-03-05 | 1,050,000 tokens | Frontier reasoning + agent workflows |
| GPT-5.3 Instant | Smaller | Faster everyday tasks |
| Claude Opus / Sonnet | ~200k tokens | Long-form reasoning |
| Gemini 3 Pro | ~1M tokens | Multimodal reasoning |
Key difference:
GPT-5.4 focuses heavily on professional productivity workflows and agent capabilities, particularly when integrated with external tools.
Limitations
- No audio or video output support
- Fine-tuning currently unavailable
- Performance may vary when tool usage is required
- Requires higher compute resources compared to smaller models