Claude Fable 5.1 vs Grok 4.6
Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Wins 0 of 8 areas
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Claude Fable 5.1 is the stronger all-rounder.Grok 4.6 is cheaper.
Both rank among the ten best models we track in reasoning.
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.
- ReasoningHard problems that need careful thinking50Claude Fable 5.15 of 6 tests · 1 tie
- CodingWriting and fixing software50Claude Fable 5.15 of 5 tests
- AgentsCarrying out multi-step tasks on its own30Claude Fable 5.13 of 3 tests
- MathCompetition and research-level math30Claude Fable 5.13 of 3 tests
- FactsGetting facts right instead of making them up21Claude Fable 5.12 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10Claude Fable 5.11 of 1 test
- Long documentsFinding answers in very long texts10Claude Fable 5.11 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Fable 5.11 of 1 test
Images and charts, 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.
Grok 4.6 costs 87% 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 5.1 pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+56.1points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+34.8points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+24.2points ahead
Where Grok 4.6 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+48.6points 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 5.1
- LMArena · WebDevClaude Fable 5.1 by 128 rating points17451617+128 rating
- SciCodeClaude Fable 5.1 by 10.163.153+10.1
- LiveBench · CodingClaude Fable 5.1 by 9.686.476.8+9.6
- LiveBench · Agentic CodingClaude Fable 5.1 by 9.166.157+9.1
- Terminal-Bench 2.1Claude Fable 5.1 by 3.491.488+3.4
AgentsClaude Fable 5.1
- Terminal-Bench 4.0Claude Fable 5.1 by 34.85217.2+34.8
- GDPValClaude Fable 5.1 by 5.562.857.3+5.5
- τ-Bench V3 · BankingClaude Fable 5.1 by 3.947.243.3+3.9
ReasoningClaude Fable 5.1
- ARC-AGI-2Claude Fable 5.1 by 22.99067.1+22.9
- Humanity's Last ExamClaude Fable 5.1 by 1559.144.1+15
- SimpleBenchClaude Fable 5.1 by 10.786.675.9+10.7
- CritPtClaude Fable 5.1 by 1029.719.7+10
- LiveBench · ReasoningClaude Fable 5.1 by 1.291.790.5+1.2
- GPQA Diamondtie93.793.5tie
FactsClaude Fable 5.1
- AA-Omniscience · Non-hallucinationGrok 4.6 by 48.627.476+48.6
- AA-Omniscience · AccuracyClaude Fable 5.1 by 24.267.243+24.2
- SimpleQA VerifiedClaude Fable 5.1 by 21.970.848.9+21.9
Images and chartsClaude Fable 5.1
- LMArena · VisionClaude Fable 5.1 by 55 rating points13201265+55 rating
MathClaude Fable 5.1
- FrontierMath Tier 4Claude Fable 5.1 by 56.187.831.7+56.1
- FrontierMath Tiers 1-3 (v2)Claude Fable 5.1 by 24.290.266+24.2
- LiveBench · MathematicsClaude Fable 5.1 by 4.49792.6+4.4
Following instructionsClaude Fable 5.1
- LiveBench · Instruction FollowingClaude Fable 5.1 by 1.17371.9+1.1
Other results9 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.
- Terminal-Bench 4.0Claude Fable 5.1 by 35.555.820.3+35.5
- AA-OmniscienceClaude Fable 5.1 by 14.243.529.3+14.2
- ARC-AGI-1Claude Fable 5.1 by 10.597.587+10.5
- AA IntelligenceClaude Fable 5.1 by 9.253.444.2+9.2
- livebench_data_analysisClaude Fable 5.1 by 6.480.373.9+6.4
- livebench_languageClaude Fable 5.1 by 5.889.583.7+5.8
- Artificial Analysis Coding IndexClaude Fable 5.1 by 5.781.675.9+5.7
- AA Agentic IndexClaude Fable 5.1 by 5.35852.7+5.3
- DeepSWE 1.1Claude Fable 5.1 by 1.567.465.9+1.5
Questions people ask
Which is better, Claude Fable 5.1 or Grok 4.6?
Claude Fable 5.1 wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Grok 4.6 wins none, but costs 87% less.
Which is better for coding?
Claude Fable 5.1. It wins 5 of the 5 coding tests both models report; Grok 4.6 wins none.
Which is cheaper?
Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; Grok 4.6 costs $2.00 and $6.00. That makes Grok 4.6 about 87% 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 23 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 9 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.