GPT-5.5
9.8editorial fit
OpenAI flagship. Strong coding and reasoning.
Compare models without flattening the tradeoffs.
Choose two or three models. We’ll keep capability, price, context, caveats, and evidence in the same view.
Decision summary
GPT-5.5 vs Claude Fable 5
Claude Fable 5
9.9editorial fit
Next-generation intelligence for long-running agents. Always-on adaptive thinking.
| Decision factor | GPT-5.5 | Claude Fable 5 |
|---|---|---|
| Editorial fit40% coding · 35% reasoning · 25% tool use | 9.8 | 9.9Best in this set |
| CodingNormalized editorial dimension | 9.8 | 9.9Best in this set |
| ReasoningNormalized editorial dimension | 9.8 | 9.9Best in this set |
| Tool useNormalized editorial dimension | 9.7 | 9.8Best in this set |
| Context windowProvider specification | 1MBest in this set | 1MBest in this set |
| Input priceUSD per 1M tokens | $5Best in this set | $10 |
| Output priceUSD per 1M tokens | $30Best in this set | $50 |
| Best fitFrom the catalog record |
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| Source trailOpen before choosing |
How to decide
Choose the constraint that can’t move.
01
Quality floor: eliminate any model that cannot reliably complete the task, regardless of price.
02
Operating constraint: compare real context, throughput, privacy, and deployment requirements.
03
Total cost: calculate the full prompt/output mix and account for retries, caching, and routing.