Model comparison

Claude Sonnet 5.5 vs Mistral Large 4

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 43.1 on the Noometry Index. Mistral Large 4 costs 3.9× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

Last verified October 10, 2026. 15 shared benchmarks.

Claude Sonnet 5.5 Anthropic

61.9

Rank #10 Confirmed

Mistral Large 4

Mistral AI

43.1

Rank #99 Confirmed

Summary

They share 15 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and Mistral Large 4 in 0 categories; 8 gaps are clear of the uncertainty.
The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 40.4.
The biggest single-benchmark swing is NYT Connections (extended): 80.5% for Claude Sonnet 5.5 and 27.4% for Mistral Large 4.
Mistral Large 4 is cheaper at $0.68 / $2.09 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
Mistral Large 4 accepts more context: 1.05M tokens versus 1M.

Side by side

Claude Sonnet 5.5 and Mistral Large 4 specifications
	Claude Sonnet 5.5	Mistral Large 4
Provider	Anthropic	Mistral AI
Noometry Index	61.9	43.1
Released	2026-09-28	2026-10-06
Weights	Proprietary	Proprietary
Context window	1M	1.05M
Max output	128K	262K
Input $ / M tokens	$2	$0.68
Output $ / M tokens	$10	$2.09
Results tracked	32	15

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Category by category

Coding Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 67.3 (#6), Mistral Large 4: 48.6 (#57)

Coding benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena WebDev	1774	1541
LMArena Coding	1513	1475
FrontierCode	52.1%	—
CursorBench	55.5%	—
FrontierSWE	61.9%	—
SciCode	61%	—
ALE-Bench	1,819	—

Agentic & Tool Use Not comparable

Claude Sonnet 5.5: 45.0 (#16), Mistral Large 4: —

Agentic & Tool Use benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
APEX-Agents	75.5%	—

Reasoning Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 54.0 (#28), Mistral Large 4: 22.5 (#192)

Reasoning benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
NYT Connections (extended)	80.5%	27.4%
LMArena Hard Prompts	1495	1444
CritPt	31.4%	—
Mystery Game Puzzles	65%	—
Epoch Capabilities Index	165.03	—

Math Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 87.9 (#6), Mistral Large 4: 40.4 (#91)

Math benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Math	1510	1488
FrontierMath (Tiers 1-3)	88.8%	—
FrontierMath Tier 4	80.5%	—
OTIS Mock AIME 2024-2025	100%	—
ProofBench	100%	—
FrontierMath Erdős	2.9%	—

Knowledge Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#12), Mistral Large 4: 36.6 (#166)

Knowledge benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
SimpleQA Verified	46.5%	20%
LMArena Expert	1540	1447
GPQA Diamond	95.6%	—

Multimodal Not comparable

Claude Sonnet 5.5: 51.5 (#6), Mistral Large 4: —

Multimodal benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Vision	1289	—
Furniture Assembly	75%	—

Multilingual Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 55.3 (#30), Mistral Large 4: 52.6 (#82)

Multilingual benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Non-English	1452	1415
LMArena Chinese	1522	1491
LMArena Russian	1451	1414

Instruction Following Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 78.3 (#11), Mistral Large 4: 75.0 (#76)

Instruction Following benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Instruction Following	1495	1424

Long Context Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 45.9 (#28), Mistral Large 4: 43.6 (#89)

Long Context benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Longer Query	1498	1429

Writing & Preference Claude Sonnet 5.5 leads

Claude Sonnet 5.5: 66.0 (#40), Mistral Large 4: 60.4 (#97)

Writing & Preference benchmarks
Benchmark	Claude Sonnet 5.5	Mistral Large 4
LMArena Text	1471	1427
LMArena Creative Writing	1465	1361
LMArena Multi-Turn	1474	1424

Frequently asked questions

Is Claude Sonnet 5.5 better than Mistral Large 4?

Which is cheaper, Claude Sonnet 5.5 or Mistral Large 4?

Mistral Large 4 is cheaper. It lists at $0.68 per million input tokens and $2.09 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

Is Claude Sonnet 5.5 or Mistral Large 4 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 48.6 in the Noometry coding category.

Which has the bigger context window?

Mistral Large 4 does, with 1.05M tokens against 1M.

How many benchmarks do Claude Sonnet 5.5 and Mistral Large 4 share?

15 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Mistral Large 4 has 15.