Claude 5.5 vs Claude Fable 5
Wins 0 of 5 areas
—
Wins 4 of 5 areas
Coding · Agents · Reasoning · Long documents
Claude Fable 5 is the stronger all-rounder.Claude 5.5 is cheaper.
Scores updated · 10 tests both models report · How we compare
Where each one wins
Tests won in each of the five areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- AgentsCarrying out multi-step tasks on its own02Claude Fable 52 of 2 tests
- ReasoningHard problems that need careful thinking02Claude Fable 52 of 2 tests
- CodingWriting and fixing software01Claude Fable 51 of 1 test
- Long documentsFinding answers in very long texts01Claude Fable 51 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Coding and long documents rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Claude 5.5 costs 80% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Fable 5 pulls ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+18.2points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+15.7points ahead
- Real work tasks from 44 professionsGDPVal+14.4points ahead
Where Claude 5.5 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+12.4points ahead
Every test, side by side
All 10 tests both models report. The winning score is in its model's colour; marks a score checked independently.
AgentsClaude Fable 5
- GDPValClaude Fable 5 by 14.441.255.6+14.4
- Terminal-Bench 4.0Claude Fable 5 by 12.629.842.4+12.6
ReasoningClaude Fable 5
- Humanity's Last ExamClaude Fable 5 by 15.739.855.5+15.7
- CritPtClaude Fable 5 by 11.716.928.6+11.7
FactsEven
- AA-Omniscience · AccuracyClaude Fable 5 by 18.247.265.3+18.2
- AA-Omniscience · Non-hallucinationClaude 5.5 by 12.448.836.4+12.4
Other results2 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA-OmniscienceClaude Fable 5 by 23.220.143.3+23.2
- AA IntelligenceClaude Fable 5 by 8.840.849.6+8.8
Questions people ask
Which is better, Claude 5.5 or Claude Fable 5?
Claude Fable 5 wins four of the five areas where both have results: coding, agents, reasoning and long documents. Claude 5.5 wins none, but costs 80% less. They are level on facts.
Which is better for coding?
Claude Fable 5. It wins the one coding test both models report.
Which is cheaper?
Claude 5.5 costs $2.00 per million input tokens and $10.00 per million output tokens; Claude Fable 5 costs $10.00 and $50.00. That makes Claude 5.5 about 80% cheaper for the same work.
How do you compare the two?
We use the 10 benchmark tests both models have published scores on. The verdict counts the 8 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 2 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.