Claude Sonnet 4.5 vs Mistral Large 3
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
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Claude Sonnet 4.5 is the stronger all-rounder.Mistral Large 3 is cheaper.
Scores updated · 28 tests both models report · How we compare
Where each one wins
Tests won in each of the seven 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.
- CodingWriting and fixing software40Claude Sonnet 4.54 of 4 tests
- ReasoningHard problems that need careful thinking40Claude Sonnet 4.54 of 4 tests
- FactsGetting facts right instead of making them up30Claude Sonnet 4.53 of 3 tests
- AgentsCarrying out multi-step tasks on its own20Claude Sonnet 4.52 of 3 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video10Claude Sonnet 4.51 of 1 test
- Long documentsFinding answers in very long texts10Claude Sonnet 4.51 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Sonnet 4.51 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.
Mistral Large 3 costs 89% 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 Sonnet 4.5 pulls ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+43.8points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+36.9points ahead
- Reasons across sets of long documentsAA-LCR+36.3points ahead
Where Mistral Large 3 pulls ahead
No clear win on a test scored out of 100.
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 Sonnet 4.5
- Terminal-Bench 2.1Claude Sonnet 4.5 by 43.855.812+43.8
- Terminal-Bench HardClaude Sonnet 4.5 by 19.735.615.9+19.7
- LMArena · WebDevClaude Sonnet 4.5 by 164 rating points13941230+164 rating
- SciCodeClaude Sonnet 4.5 by 9.145.736.6+9.1
AgentsClaude Sonnet 4.5
- GDPValClaude Sonnet 4.5 by 20.520.50+20.5
- τ-Bench V3 · BankingClaude Sonnet 4.5 by 18.724.55.8+18.7
- Terminal-Bench 4.0tie00tie
ReasoningClaude Sonnet 4.5
- SimpleBenchClaude Sonnet 4.5 by 33.954.320.4+33.9
- GPQA DiamondClaude Sonnet 4.5 by 15.483.468+15.4
- Humanity's Last ExamClaude Sonnet 4.5 by 13.617.84.2+13.6
- CritPtClaude Sonnet 4.5 by 1.11.10+1.1
FactsClaude Sonnet 4.5
- AA-Omniscience · Non-hallucinationClaude Sonnet 4.5 by 36.950.914+36.9
- AA-Omniscience · AccuracyClaude Sonnet 4.5 by 7.932.924.9+7.9
- Vectara HHEM hallucination ratelower is betterClaude Sonnet 4.5 by 2.51214.5+2.5
Images and chartsClaude Sonnet 4.5
- MMMU-ProClaude Sonnet 4.5 by 1368.755.7+13
Long documentsClaude Sonnet 4.5
- AA-LCRClaude Sonnet 4.5 by 36.372.336+36.3
Following instructionsClaude Sonnet 4.5
- IFBenchClaude Sonnet 4.5 by 21.157.336.2+21.1
Other results11 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.
- τ²-Bench Telecom (AA run)Claude Sonnet 4.5 by 53.578.124.6+53.5
- AA-OmniscienceClaude Sonnet 4.5 by 39.5-0.1-39.6+39.5
- LiveCodeBenchClaude Sonnet 4.5 by 36.67134.4+36.6
- Artificial Analysis Coding IndexClaude Sonnet 4.5 by 3252.120.1+32
- AA Agentic IndexClaude Sonnet 4.5 by 15.117.52.4+15.1
- MMMLUClaude Sonnet 4.5 by 14.989.174.2+14.9
- MMLU-ReduxClaude Sonnet 4.5 by 13.695.682+13.6
- AA IntelligenceClaude Sonnet 4.5 by 11.420.79.3+11.4
- vectara_answer_rateMistral Large 3 by 3.295.698.8+3.2
- vectara_factual_consistencyClaude Sonnet 4.5 by 2.58885.5+2.5
- vectara_avg_summary_lengthClaude Sonnet 4.5 by 15.1 rating points127.8112.7+15.1 rating
Questions people ask
Which is better, Claude Sonnet 4.5 or Mistral Large 3?
Claude Sonnet 4.5 wins all seven areas where both have results: coding, agents, reasoning, facts, images and charts, long documents and following instructions. Mistral Large 3 wins none, but costs 89% less.
Which is better for coding?
Claude Sonnet 4.5. It wins 4 of the 4 coding tests both models report; Mistral Large 3 wins none.
Which is cheaper?
Claude Sonnet 4.5 costs $3.00 per million input tokens and $15.00 per million output tokens; Mistral Large 3 costs $0.50 and $1.50. That makes Mistral Large 3 about 89% 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 17 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 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.