Claude Opus 4.8 vs LongCat-2.0
Wins 5 of 5 areas
Coding · Agents · Reasoning · Facts · Long documents
Wins 0 of 5 areas
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Claude Opus 4.8 is the stronger all-rounder.LongCat-2.0 is cheaper.
Scores updated · 15 tests both models report · How we compare
Where each one wins
Tests won in each of the five areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- AgentsCarrying out multi-step tasks on its own30Claude Opus 4.83 of 3 tests
- ReasoningHard problems that need careful thinking30Claude Opus 4.83 of 3 tests
- CodingWriting and fixing software20Claude Opus 4.82 of 2 tests
- FactsGetting facts right instead of making them up20Claude Opus 4.82 of 2 tests
- Long documentsFinding answers in very long texts10Claude Opus 4.81 of 1 test
Long documents rests on a single test.
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.
LongCat-2.0 costs 95% 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
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+36.1points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+34.4points ahead
- Real work tasks from 44 professionsGDPVal+29.2points ahead
Where LongCat-2.0 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 15 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 34.484.650.2+34.4
- SciCodeClaude Opus 4.8 by 18.154.436.3+18.1
AgentsClaude Opus 4.8
- GDPValClaude Opus 4.8 by 29.247.818.6+29.2
- Terminal-Bench 4.0Claude Opus 4.8 by 21.721.70+21.7
- τ-Bench V3 · BankingClaude Opus 4.8 by 2134.213.2+21
ReasoningClaude Opus 4.8
- CritPtClaude Opus 4.8 by 18.320.92.6+18.3
- Humanity's Last ExamClaude Opus 4.8 by 1548.733.7+15
- GPQA DiamondClaude Opus 4.8 by 149278+14
FactsClaude Opus 4.8
- AA-Omniscience · Non-hallucinationClaude Opus 4.8 by 36.160.724.6+36.1
- AA-Omniscience · AccuracyClaude Opus 4.8 by 19.248.829.6+19.2
Other results4 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-OmniscienceClaude Opus 4.8 by 52.228.8-23.4+52.2
- Artificial Analysis Coding IndexClaude Opus 4.8 by 2974.345.3+29
- AA Agentic IndexClaude Opus 4.8 by 26.742.615.9+26.7
- AA IntelligenceClaude Opus 4.8 by 22.741.819.1+22.7
Questions people ask
Which is better, Claude Opus 4.8 or LongCat-2.0?
Claude Opus 4.8 wins all five areas where both have results: coding, agents, reasoning, facts and long documents. LongCat-2.0 wins none, but costs 95% less.
Which is better for coding?
Claude Opus 4.8. It wins 2 of the 2 coding tests both models report; LongCat-2.0 wins none.
Which is cheaper?
Claude Opus 4.8 costs $5.00 per million input tokens and $25.00 per million output tokens; LongCat-2.0 costs $0.30 and $1.20. That makes LongCat-2.0 about 95% cheaper for the same work.
How do you compare the two?
We use the 15 benchmark tests both models have published scores on. The verdict counts the 11 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 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.