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Claude Opus 5 (Fast) vs GPT-5.4
List-price comparison ·Claude Opus 5 (Fast) details ·GPT-5.4 details
For a typical workload (100,000 requests / mo), GPT-5.4 is the cheapest — 72% less than the priciest here ($900.00/mo vs $3,200.00/mo).
| Claude Opus 5 (Fast) | GPT-5.4 | |
|---|---|---|
| Input / 1M tokens | $10.00 | $2.50 |
| Output / 1M tokens | $50.00 | $15.00 |
| Typical request (1,200 in + 400 out) | $0.032 | $0.009 |
| Context window | 1M tokens | 1050k tokens |
| Max output | 128k tokens | 128k tokens |
| Quality score | 92/100 | 95/100 |
| Tier | Flash | Flagship |
| Provider | Anthropic | OpenAI |
Projected monthly cost
| Requests / mo | Claude Opus 5 (Fast) | GPT-5.4 |
|---|---|---|
| 1,000 | $32.00 | $9.00 |
| 10,000 | $320.00 | $90.00 |
| 100,000 | $3,200.00 | $900.00 |
Claude Opus 5 (Fast)
Auto-synced from OpenRouter — no editorial write-up yet.
GPT-5.4
Excellent general-purpose reasoning and broad world knowledge, with strong performance on coding, math, and multi-modal (image + file) inputs.
Output tokens are priced well above input tokens, so verbose responses dominate cost — tight max-token limits and prompt caching matter.
More comparisons
Vendor list rates · per-request examples assume 1,200 input + 400 output tokens.