Claude Opus 4.5 vs Gemini 2.5 Pro
Wins 6 of 8 areas
Coding · Agents · Reasoning · Math · Long documents · Following instructions
Wins 0 of 8 areas
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Claude Opus 4.5 is the stronger all-rounder.Gemini 2.5 Pro is cheaper.
Scores updated · 43 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 4.54 of 4 tests
- ReasoningHard problems that need careful thinking40Claude Opus 4.54 of 4 tests
- AgentsCarrying out multi-step tasks on its own20Claude Opus 4.52 of 2 tests
- MathCompetition and research-level math20Claude Opus 4.52 of 2 tests
- Long documentsFinding answers in very long texts20Claude Opus 4.52 of 2 tests
- Following instructionsDoing exactly what it is asked20Claude Opus 4.52 of 2 tests
- FactsGetting facts right instead of making them up22Even2 each
- Images and chartsUnderstanding pictures, charts and video11Even1 each · 2 ties
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.
Gemini 2.5 Pro costs 63% 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 Opus 4.5 pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+32.7points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+29.9points ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+27.1points ahead
Where Gemini 2.5 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+10.3points ahead
- Math problems shown in pictures and chartsMathVista+3.7points ahead
Every test, side by side
All 43 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 4.5
- LMArena · WebDevClaude Opus 4.5 by 245 rating points14691224+245 rating
- Terminal-Bench HardClaude Opus 4.5 by 20.54726.5+20.5
- SWE-bench VerifiedClaude Opus 4.5 by 17.780.963.2+17.7
- SciCodeClaude Opus 4.5 by 3.249.546.3+3.2
AgentsClaude Opus 4.5
- GDPValClaude Opus 4.5 by 47.347.30+47.3
- BrowseCompClaude Opus 4.5 by 27.1379.9+27.1
ReasoningClaude Opus 4.5
- ARC-AGI-2Claude Opus 4.5 by 32.737.64.9+32.7
- Humanity's Last ExamClaude Opus 4.5 by 12.130.118+12.1
- GPQA DiamondClaude Opus 4.5 by 386.683.6+3
- CritPtClaude Opus 4.5 by 24.62.6+2
FactsEven
- AA-Omniscience · Non-hallucinationClaude Opus 4.5 by 29.9399.1+29.9
- SimpleQA VerifiedGemini 2.5 Pro by 10.345.756+10.3
- AA-Omniscience · AccuracyClaude Opus 4.5 by 7.546.639+7.5
- Vectara HHEM hallucination ratelower is betterGemini 2.5 Pro by 3.910.97+3.9
Images and chartsEven
MathClaude Opus 4.5
- FrontierMath Tiers 1-3 (v2)Claude Opus 4.5 by 9.834.424.6+9.8
- FrontierMath Tier 4Claude Opus 4.5 by 4.94.90+4.9
Long documentsClaude Opus 4.5
- AA-LCRClaude Opus 4.5 by 8.377.369+8.3
- LongBench v2Claude Opus 4.5 by 5.664.458.8+5.6
Following instructionsClaude Opus 4.5
- IFBenchClaude Opus 4.5 by 9.35848.7+9.3
- Multi-ChallengeClaude Opus 4.5 by 5.45953.6+5.4
Other results19 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 Agentic IndexClaude Opus 4.5 by 56.159.63.5+56.1
- ARC-AGI-1Claude Opus 4.5 by 458237+45
- τ²-BenchClaude Opus 4.5 by 44.298.254+44.2
- τ²-Bench Telecom (AA run)Claude Opus 4.5 by 35.489.554.1+35.4
- AA-OmniscienceClaude Opus 4.5 by 30.314-16.4+30.3
- HLE (with tools)Claude Opus 4.5 by 14.843.228.4+14.8
- AA IntelligenceClaude Opus 4.5 by 14.129.115+14.1
- HMMT Nov. 2025Claude Opus 4.5 by 13.393.380+13.3
- LiveCodeBenchClaude Opus 4.5 by 12.88774.2+12.8
- HMMT Feb. 2025Claude Opus 4.5 by 12.192.980.8+12.1
- AIME 2025Claude Opus 4.5 by 9.892.883+9.8
- vectara_factual_consistencyGemini 2.5 Pro by 3.989.193+3.9
- MATH-VisionClaude Opus 4.5 by 3.877.173.3+3.8
- MMLU-ProClaude Opus 4.5 by 3.589.586+3.5
- Artificial Analysis Coding IndexClaude Opus 4.5 by 1.147.846.7+1.1
- vectara_avg_summary_lengthtie114.5106.4tie
- VideoMMMUtie84.483.6tie
- vectara_answer_ratetie98.799.1tie
- frontiermath_tier_4_v1tie4.24.2tie
Questions people ask
Which is better, Claude Opus 4.5 or Gemini 2.5 Pro?
Claude Opus 4.5 wins six of the eight areas we test: coding, agents, reasoning, math, long documents and following instructions. Gemini 2.5 Pro wins none, but costs 63% less. They are level on facts and images and charts.
Which is better for coding?
Claude Opus 4.5. It wins 4 of the 4 coding tests both models report; Gemini 2.5 Pro wins none.
Which is cheaper?
Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens; Gemini 2.5 Pro costs $1.25 and $10.00. That makes Gemini 2.5 Pro about 63% cheaper for the same work.
How do you compare the two?
We use the 43 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 19 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.