Claude Fable 5.1 vs GPT-6 Astra API pricing
They have the same standard per-token price, so the bill is identical for any workload; check the fine print for long-context or other differences. Prices last checked 2026-10-15.
| Claude Fable 5.1 (Anthropic) | GPT-6 Astra (OpenAI) | |
|---|---|---|
| Input $/1M tokens | $10.0 | $10.0 |
| Output $/1M tokens | $50.0 | $50.0 |
| Context | — | — |
| Our tier (1–4) | 4 | 4 |
Example monthly bills
| Workload | Claude Fable 5.1 | GPT-6 Astra | Cheaper |
|---|---|---|---|
| Chat / Q&A 10M in / 2M out per month | $200.00 | $200.00 | Same cost |
| Coding 20M in / 5M out per month | $450.00 | $450.00 | Same cost |
| Output-heavy (reasoning, long answers) 10M in / 10M out per month | $600.00 | $600.00 | Same cost |
Fine print
- Claude Fable 5.1: Context 'up to 1M, varies by model'
- GPT-6 Astra: ≤272K input; long context $20/$75
Cost only, not quality. “Tier” is our rough capability judgment, not a benchmark, and different tokenizers count the same text differently. Reasoning models may bill extra thinking tokens as output. Official sources: Anthropic, OpenAI.
See all models on the full price table, the Anthropic and OpenAI pricing pages, or try the savings calculator with your own numbers.