Claude Opus 4.8 vs Gemini 2.5 Pro
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 Opus 4.8 is the stronger all-rounder.Gemini 2.5 Pro is cheaper.
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 software50Claude Opus 4.85 of 5 tests
- ReasoningHard problems that need careful thinking50Claude Opus 4.85 of 5 tests
- AgentsCarrying out multi-step tasks on its own40Claude Opus 4.84 of 4 tests
- MathCompetition and research-level math20Claude Opus 4.82 of 2 tests
- FactsGetting facts right instead of making them up21Claude Opus 4.82 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10Claude Opus 4.81 of 1 test
- Long documentsFinding answers in very long texts10Claude Opus 4.81 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Opus 4.81 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.
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 4.8 pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+74.4points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+67.2points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+56.1points ahead
Where Gemini 2.5 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+3points 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 Opus 4.8
- Terminal-Bench 2.1Claude Opus 4.8 by 56.184.628.5+56.1
- LMArena · WebDevClaude Opus 4.8 by 332 rating points15561224+332 rating
- Terminal-Bench HardClaude Opus 4.8 by 31.858.326.5+31.8
- SWE-bench VerifiedClaude Opus 4.8 by 25.488.663.2+25.4
- SciCodeClaude Opus 4.8 by 8.154.446.3+8.1
AgentsClaude Opus 4.8
- BrowseCompClaude Opus 4.8 by 74.484.39.9+74.4
- GDPValClaude Opus 4.8 by 47.847.80+47.8
- τ-Bench V3 · BankingClaude Opus 4.8 by 24.534.29.7+24.5
- Terminal-Bench 4.0Claude Opus 4.8 by 21.721.70+21.7
ReasoningClaude Opus 4.8
- ARC-AGI-2Claude Opus 4.8 by 67.272.14.9+67.2
- Humanity's Last ExamClaude Opus 4.8 by 30.748.718+30.7
- CritPtClaude Opus 4.8 by 18.320.92.6+18.3
- SimpleBenchClaude Opus 4.8 by 13.264.851.6+13.2
- GPQA DiamondClaude Opus 4.8 by 8.49283.6+8.4
FactsClaude Opus 4.8
- AA-Omniscience · Non-hallucinationClaude Opus 4.8 by 51.660.79.1+51.6
- AA-Omniscience · AccuracyClaude Opus 4.8 by 9.748.839+9.7
- SimpleQA VerifiedGemini 2.5 Pro by 35356+3
Images and chartsClaude Opus 4.8
- LMArena · VisionClaude Opus 4.8 by 32 rating points12951263+32 rating
MathClaude Opus 4.8
- FrontierMath Tier 4Claude Opus 4.8 by 56.156.10+56.1
- FrontierMath Tiers 1-3 (v2)Claude Opus 4.8 by 55.48024.6+55.4
Following instructionsClaude Opus 4.8
- IFBenchClaude Opus 4.8 by 13.562.248.7+13.5
Other results10 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.
- ARC-AGI-1Claude Opus 4.8 by 55.592.537+55.5
- AA-OmniscienceClaude Opus 4.8 by 45.128.8-16.4+45.1
- τ²-Bench Telecom (AA run)Claude Opus 4.8 by 40.394.454.1+40.3
- AA Agentic IndexClaude Opus 4.8 by 39.142.63.5+39.1
- HLE (with tools)Claude Opus 4.8 by 29.557.928.4+29.5
- Artificial Analysis Coding IndexClaude Opus 4.8 by 27.674.346.7+27.6
- frontiermath_tier_4_v1Claude Opus 4.8 by 27.131.34.2+27.1
- AA IntelligenceClaude Opus 4.8 by 26.841.815+26.8
- HMMT Nov. 2025Claude Opus 4.8 by 16.596.580+16.5
- matharena_visual_math_overallClaude Opus 4.8 by 4.481.677.2+4.4
Questions people ask
Which is better, Claude Opus 4.8 or Gemini 2.5 Pro?
Claude Opus 4.8 wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Gemini 2.5 Pro wins none, but costs 63% less.
Which is better for coding?
Claude Opus 4.8. It wins 5 of the 5 coding tests both models report; Gemini 2.5 Pro wins none.
Which is cheaper?
Claude Opus 4.8 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 32 benchmark tests both models have published scores on. The verdict counts the 22 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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.