Claude Fable 5 vs GPT-5
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents
Wins 1 of 8 areas
Following instructions
Claude Fable 5 is the stronger all-rounder.GPT-5 is cheaper and better at following instructions.
Scores updated · 32 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software70Claude Fable 57 of 7 tests
- ReasoningHard problems that need careful thinking50Claude Fable 55 of 5 tests
- AgentsCarrying out multi-step tasks on its own30Claude Fable 53 of 3 tests
- FactsGetting facts right instead of making them up30Claude Fable 53 of 3 tests
- Images and chartsUnderstanding pictures, charts and video20Claude Fable 52 of 2 tests
- MathCompetition and research-level math20Claude Fable 52 of 2 tests
- Long documentsFinding answers in very long texts10Claude Fable 51 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-51 of 1 test
Long documents and following instructions 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.
GPT-5 costs 81% 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
- Abstract visual puzzles that people can solveARC-AGI-2+79.3points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+68.2points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+49.4points ahead
Where GPT-5 pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+9.6points ahead
Every test, side by side
All 32 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Fable 5
- Terminal-Bench 2.1Claude Fable 5 by 49.484.635.2+49.4
- SWE-bench ProClaude Fable 5 by 38.28041.8+38.2
- SWE-bench MultilingualClaude Fable 5 by 31.386.655.3+31.3
- Terminal-Bench HardClaude Fable 5 by 30.362.932.6+30.3
- LMArena · WebDevClaude Fable 5 by 207 rating points16241417+207 rating
- SWE-bench VerifiedClaude Fable 5 by 20.19574.9+20.1
- SciCodeClaude Fable 5 by 18.16142.9+18.1
AgentsClaude Fable 5
- GDPValClaude Fable 5 by 34.655.520.9+34.6
- BrowseCompClaude Fable 5 by 32.587.454.9+32.5
- τ-Bench V3 · BankingClaude Fable 5 by 1638.122.1+16
ReasoningClaude Fable 5
- ARC-AGI-2Claude Fable 5 by 79.389.29.9+79.3
- Humanity's Last ExamClaude Fable 5 by 2755.528.5+27
- SimpleBenchClaude Fable 5 by 25.281.956.7+25.2
- CritPtClaude Fable 5 by 22.928.65.7+22.9
- GPQA DiamondClaude Fable 5 by 7.292.685.4+7.2
FactsClaude Fable 5
- AA-Omniscience · AccuracyClaude Fable 5 by 25.165.340.3+25.1
- SimpleQA VerifiedClaude Fable 5 by 20.670.750.1+20.6
- AA-Omniscience · Non-hallucinationClaude Fable 5 by 18.636.417.8+18.6
Images and chartsClaude Fable 5
- LMArena · VisionClaude Fable 5 by 117 rating points13251208+117 rating
- MMMU-ProClaude Fable 5 by 1084.274.2+10
MathClaude Fable 5
- FrontierMath Tier 4Claude Fable 5 by 68.290.221.9+68.2
- FrontierMath Tiers 1-3 (v2)Claude Fable 5 by 31.68755.4+31.6
Other results8 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 5243.3-8.7+52
- Artificial Analysis Coding IndexClaude Fable 5 by 38.776.537.8+38.7
- ARC-AGI-1Claude Fable 5 by 32.898.565.7+32.8
- HLE (with tools)Claude Fable 5 by 28.663.835.2+28.6
- AA IntelligenceClaude Fable 5 by 26.649.623+26.6
- AA Agentic IndexClaude Fable 5 by 24.55126.5+24.5
- τ²-Bench Telecom (AA run)Claude Fable 5 by 13.798.584.8+13.7
- HealthBenchGPT-5 by 661.267.2+6
Questions people ask
Which is better, Claude Fable 5 or GPT-5?
Claude Fable 5 wins seven of the eight areas we test: coding, agents, reasoning, facts, images and charts, math and long documents. GPT-5 wins following instructions, and costs 81% less.
Which is better for coding?
Claude Fable 5. It wins 7 of the 7 coding tests both models report; GPT-5 wins none.
Which is cheaper?
Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; GPT-5 costs $1.25 and $10.00. That makes GPT-5 about 81% cheaper for the same work.
How do you compare the two?
We use the 32 benchmark tests both models have published scores on. The verdict counts the 24 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 8 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.