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Claude Fable 5 vs GPT-5.1
List-price comparison · Claude Fable 5 details · GPT-5.1 details
For a typical workload (100,000 requests / mo), GPT-5.1 costs 83% less — $550.00/mo vs $3,200.00/mo.
| Claude Fable 5 | GPT-5.1 | |
|---|---|---|
| Input / 1M tokens | $10.00 | $1.25 |
| Output / 1M tokens | $50.00 | $10.00 |
| Typical request (1,200 in + 400 out) | $0.032 | $0.0055 |
| Context window | 1M tokens | 400k tokens |
| Max output | 128k tokens | 128k tokens |
| Tier | Flagship | Flagship |
| Provider | Anthropic | OpenAI |
Projected monthly cost
1,000 requests / month$32.00 vs $5.5010,000 requests / month$320.00 vs $55.00100,000 requests / month$3,200.00 vs $550.00
Rows open both models in the calculator — adjust volume and token counts there.
More comparisons
Vendor list rates · per-request examples assume 1,200 input + 400 output tokens.