LLM Comparison
Claude Opus 4.6 (Fast) vs GPT-5.4 Nano
Side-by-side specs, pricing & capabilities · Updated April 2026
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2/6 modelsSame tier:
 Claude Opus 4.6 (Fast) |  GPT-5.4 Nano | |
|---|---|---|
| Organization |  Anthropic |  OpenAI |
| OpenTools Score | 73 0.8 | |
| Family | Claude | GPT |
| Status | Current | Current |
| Release Date | Apr 2026 | Mar 2026 |
| Context Window | 1.0M tokens | 400K tokens |
| Input Price | $30.00/M tokens | $0.20/M tokens |
| Output Price | $150.00/M tokens | $1.25/M tokens |
| Pricing Notes | Cache read: $3.0000/M tokens | Cache read: $0.0200/M tokens |
| Capabilities | textvisioncodetool-use | textvisioncode |
| Max Output | 128K tokens | 128K tokens |
| API Identifier | anthropic/claude-opus-4.6-fast | openai/gpt-5.4-nano |
| Benchmarks | ||
| MMLU | 89.8 | — |
| HumanEval | 91.5 | — |
| MATH | 84.9 | — |
| GPQA | 72.4 | — |
| View Claude Opus 4.6 (Fast) | View GPT-5.4 Nano | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.4 NanoCheapest | $0.20 | $0.63 | $0.83 | — |
| Claude Opus 4.6 (Fast) | $30.00 | $75.00 | $105.00 | +12627% |
Anthropic
Claude Opus 4.6 (Fast)
Claude Opus 4.6 (Fast) is a multimodal llm from Anthropic. Supports up to 1,000,000 token context window. Achieves 89.8% on MMLU. Available from $30.00/M input tokens.
OpenAI
GPT-5.4 Nano
GPT-5.4 Nano is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.20/M input tokens.
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