Claude Opus 4.5 vs Claude Opus 5
Wins 0 of 8 areas
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Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Claude Opus 5 is the stronger all-rounder.
Scores updated · 34 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 software07Claude Opus 57 of 7 tests
- ReasoningHard problems that need careful thinking05Claude Opus 55 of 5 tests
- AgentsCarrying out multi-step tasks on its own04Claude Opus 54 of 4 tests
- MathCompetition and research-level math03Claude Opus 53 of 3 tests
- FactsGetting facts right instead of making them up02Claude Opus 52 of 3 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video02Claude Opus 52 of 2 tests
- Long documentsFinding answers in very long texts01Claude Opus 51 of 1 test
- Following instructionsDoing exactly what it is asked01Claude Opus 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.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Opus 5 pulls ahead
- Fixes real GitHub issues in many programming languagesSWE-bench Multilingual+82.5points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+68.3points ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+53.8points ahead
Where Claude Opus 4.5 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 34 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 5
- SWE-bench MultilingualClaude Opus 5 by 82.5789.5+82.5
- SWE-bench ProClaude Opus 5 by 27.25279.2+27.2
- LiveBench · Agentic CodingClaude Opus 5 by 25.539.765.2+25.5
- LMArena · WebDevClaude Opus 5 by 227 rating points14681695+227 rating
- SWE-bench VerifiedClaude Opus 5 by 15.180.996+15.1
- SciCodeClaude Opus 5 by 6.949.556.4+6.9
- LiveBench · CodingClaude Opus 5 by 1.879.781.5+1.8
AgentsClaude Opus 5
- BrowseCompClaude Opus 5 by 53.83790.8+53.8
- MCP AtlasClaude Opus 5 by 23.562.385.8+23.5
- OSWorld-VerifiedClaude Opus 5 by 17.166.383.4+17.1
- GDPValClaude Opus 5 by 13.947.361.2+13.9
ReasoningClaude Opus 5
- ARC-AGI-2Claude Opus 5 by 52.837.690.4+52.8
- Humanity's Last ExamClaude Opus 5 by 24.830.154.9+24.8
- CritPtClaude Opus 5 by 24.54.629.1+24.5
- LiveBench · ReasoningClaude Opus 5 by 11.180.191.2+11.1
- GPQA DiamondClaude Opus 5 by 6.686.693.2+6.6
FactsClaude Opus 5
- AA-Omniscience · AccuracyClaude Opus 5 by 14.346.660.9+14.3
- SimpleQA VerifiedClaude Opus 5 by 14.245.759.9+14.2
- AA-Omniscience · Non-hallucinationtie3939.2tie
Images and chartsClaude Opus 5
- CharXiv (RQ)Claude Opus 5 by 16.567.283.7+16.5
- MMMU-ProClaude Opus 5 by 10.77484.7+10.7
MathClaude Opus 5
- FrontierMath Tier 4Claude Opus 5 by 68.34.973.2+68.3
- FrontierMath Tiers 1-3 (v2)Claude Opus 5 by 51.234.485.6+51.2
- LiveBench · MathematicsClaude Opus 5 by 5.390.495.7+5.3
Following instructionsClaude Opus 5
- LiveBench · Instruction FollowingClaude Opus 5 by 1.262.563.8+1.2
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.
- Artificial Analysis Coding IndexClaude Opus 5 by 30.247.878+30.2
- AA-OmniscienceClaude Opus 5 by 23.11437.1+23.1
- AA IntelligenceClaude Opus 5 by 21.729.150.8+21.7
- HLE (with tools)Claude Opus 5 by 20.443.263.6+20.4
- ARC-AGI-1Claude Opus 5 by 15.58297.5+15.5
- livebench_languageClaude Opus 5 by 7.481.388.7+7.4
- AA Agentic IndexClaude Opus 4.5 by 3.459.656.2+3.4
- livebench_data_analysistie74.474.5tie
Questions people ask
Which is better, Claude Opus 4.5 or Claude Opus 5?
Claude Opus 5 wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Claude Opus 4.5 wins none.
Which is better for coding?
Claude Opus 5. It wins 7 of the 7 coding tests both models report; Claude Opus 4.5 wins none.
Which is cheaper?
Claude Opus 4.5 costs $5.00 per million input tokens and $25.00 per million output tokens; Claude Opus 5 costs $5.00 and $25.00. For a million tokens read plus a million written, they cost about the same.
How do you compare the two?
We use the 34 benchmark tests both models have published scores on. The verdict counts the 26 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.