Claude Opus 5.5 vs Grok 4.7
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents
Wins 1 of 8 areas
Following instructions
Claude Opus 5.5 is the stronger all-rounder.Grok 4.7 is cheaper and better at following instructions.
Both rank among the ten best models we track in facts.
Scores updated · 28 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 software40Claude Opus 5.54 of 4 tests
- ReasoningHard problems that need careful thinking40Claude Opus 5.54 of 4 tests
- MathCompetition and research-level math30Claude Opus 5.53 of 3 tests
- AgentsCarrying out multi-step tasks on its own21Claude Opus 5.52 of 3 tests
- FactsGetting facts right instead of making them up21Claude Opus 5.52 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10Claude Opus 5.51 of 1 test
- Long documentsFinding answers in very long texts10Claude Opus 5.51 of 1 test
- Following instructionsDoing exactly what it is asked01Grok 4.71 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 4.7 costs 67% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Opus 5.5 pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+77.9points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+38.2points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+33.8points ahead
Where Grok 4.7 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+29.3points ahead
- Follows detailed instructions exactlyLiveBench · Instruction Following+9.6points ahead
- Finds the root cause of IT system incidentsAA IT-Bench SRE+3.9points ahead
Every test, side by side
All 28 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 5.5
- LiveBench · Agentic CodingClaude Opus 5.5 by 17.771.754+17.7
- LMArena · WebDevClaude Opus 5.5 by 177 rating points18151638+177 rating
- LiveBench · CodingClaude Opus 5.5 by 12.189.377.2+12.1
- SciCodeClaude Opus 5.5 by 9.566.957.4+9.5
AgentsClaude Opus 5.5
- Terminal-Bench 4.0Claude Opus 5.5 by 33.859.625.8+33.8
- GDPValClaude Opus 5.5 by 7.568.360.8+7.5
- AA IT-Bench SREGrok 4.7 by 3.938.242.1+3.9
ReasoningClaude Opus 5.5
- ARC-AGI-2Claude Opus 5.5 by 30.391.761.4+30.3
- Humanity's Last ExamClaude Opus 5.5 by 18.361.443.1+18.3
- CritPtClaude Opus 5.5 by 1431.717.7+14
- LiveBench · ReasoningClaude Opus 5.5 by 9.592.282.7+9.5
FactsClaude Opus 5.5
- AA-Omniscience · Non-hallucinationGrok 4.7 by 29.341.470.7+29.3
- AA-Omniscience · AccuracyClaude Opus 5.5 by 18.766.247.5+18.7
- SimpleQA VerifiedClaude Opus 5.5 by 16.272.256+16.2
Images and chartsClaude Opus 5.5
- MMMU-ProClaude Opus 5.5 by 9.587.778.2+9.5
MathClaude Opus 5.5
- FrontierMath Tier 4Claude Opus 5.5 by 77.99517.1+77.9
- FrontierMath Tiers 1-3 (v2)Claude Opus 5.5 by 38.291.253+38.2
- LiveBench · MathematicsClaude Opus 5.5 by 1.497.195.7+1.4
Following instructionsGrok 4.7
- LiveBench · Instruction FollowingGrok 4.7 by 9.665.775.3+9.6
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.
- Terminal-Bench 4.0Claude Opus 5.5 by 28.466.438+28.4
- AA-OmniscienceClaude Opus 5.5 by 14.446.432+14.4
- AA IntelligenceClaude Opus 5.5 by 11.257.646.4+11.2
- HealthBench ProfessionalClaude Opus 5.5 by 8.965.656.7+8.9
- ARC-AGI-1Claude Opus 5.5 by 897.589.5+8
- livebench_languageClaude Opus 5.5 by 6.286.380.1+6.2
- livebench_data_analysisClaude Opus 5.5 by 3.480.376.9+3.4
- DeepSWE 1.1Claude Opus 5.5 by 3.274.271+3.2
Questions people ask
Which is better, Claude Opus 5.5 or Grok 4.7?
Claude Opus 5.5 wins seven of the eight areas we test: coding, agents, reasoning, facts, images and charts, math and long documents. Grok 4.7 wins following instructions, and costs 67% less.
Which is better for coding?
Claude Opus 5.5. It wins 4 of the 4 coding tests both models report; Grok 4.7 wins none.
Which is cheaper?
Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens; Grok 4.7 costs $2.00 and $6.00. That makes Grok 4.7 about 67% cheaper for the same work.
How do you compare the two?
We use the 28 benchmark tests both models have published scores on. The verdict counts the 20 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.