Claude Fable 5 vs Claude Opus 4.7: Half-Price Pressure
Claude Fable 5 wins the crown fight, but Claude Opus 4.7 lands the value shots. Fable has the cleaner benchmark edge: 95.0% on SWE-bench Verified and 94.6% on GPQA Diamond. Opus 4.7 is barely behind on GPQA at 94.2%, while costing exactly half as much per token.
Reasoning: Fable leads, but not by a knockout
On GPQA Diamond, this is a razor-close card: Claude Fable 5 scores 94.6%, while Claude Opus 4.7 scores 94.2%. That’s a 0.4-point gap. In daily expert reasoning, that’s not nothing, but it’s not a walkover either.
Fable is the safer pick when you’re paying for the last inch: hard research prompts, multi-step technical analysis, or tasks where one subtle miss costs more than the API bill. Opus 4.7, though, is right there in the pocket. If your workload tolerates a tiny benchmark dip, it’s throwing serious counterpunches.
Coding: Fable has the posted champ number
Here’s where Fable gets its cleanest highlight: 95.0% on SWE-bench Verified. That’s the strongest concrete coding number in the material, and it matters because SWE-bench Verified is closer to real software repair than toy code trivia.
For Opus 4.7, the supplied material gives a GPQA Diamond score but not a SWE-bench Verified score. So no fake haymakers here: Fable has the documented coding edge, while Opus 4.7 can’t claim parity on the numbers we have.
Price: Opus 4.7 hits twice as hard per dollar
Claude Fable 5 costs $10.00/1M input tokens and $50.00/1M output tokens. Claude Opus 4.7 costs $5.00/1M input tokens and $25.00/1M output tokens.
That’s not a small discount. Opus 4.7 is exactly 50% cheaper on both input and output. For chat-heavy agents, code review loops, and long drafting workflows, that output price gap can decide the fight fast.