Model comparison · updated 2026-07-28
Side-by-side pricing for1 million tokens
| Claude Fable 5 | GPT-5.5 | Verdict | |
|---|---|---|---|
| Provider | Anthropic | OpenAI | -- |
| Context window | 1M | 400K | -- |
| Input / 1M tokens | $10 | $5 | GPT-5.5 is 2x cheaper |
| Output / 1M tokens | $50 | $30 | GPT-5.5 is 1.7x cheaper |
| Output:input ratio | 5x | 6x | -- |
| Tier | frontier | flagship | -- |
GPT-5.5: Long-context (>272K input) priced at 2× input / 1.5× output.
Claude Fable 5
1,000,000 tokens
GPT-5.5
2,000,000 tokens
GPT-5.5 gives you 2x more input for the same budget.
Claude Fable 5
200,000 tokens
GPT-5.5
333,333 tokens
GPT-5.5 gives you 1.7x more output for the same budget.