Model comparison

Mistral Medium 3.1 vs Solar Pro4

Solar Pro4 is the stronger model overall, scoring 42.1 to 31.9 on the Noometry Index.

Last verified October 11, 2026. 0 shared benchmarks.

Mistral Medium 3.1

Mistral AI

31.9

Rank #266 Reported

Solar Pro4

Upstage

42.1

Rank #121 Confirmed

Summary

The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 10.6.
Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $0.40 / $2 for Mistral Medium 3.1.
Solar Pro4 accepts more context: 524K tokens versus 131K.

Side by side

Mistral Medium 3.1 and Solar Pro4 specifications
	Mistral Medium 3.1	Solar Pro4
Provider	Mistral AI	Upstage
Noometry Index	31.9	42.1
Released	—	2026-08-06
Weights	Proprietary	Proprietary
Context window	131K	524K
Max output	105K	131K
Input $ / M tokens	$0.40	$0.30
Output $ / M tokens	$2	$1.20
Results tracked	3	18

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Category by category

Coding Not comparable

Mistral Medium 3.1: —, Solar Pro4: 40.1 (#149)

Coding benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena WebDev	—	1371
LMArena Coding	—	1437

Reasoning Solar Pro4 leads

Mistral Medium 3.1: 10.6 (#341), Solar Pro4: 28.5 (#104)

Reasoning benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
NYT Connections (extended)	6.5%	—
Thematic Generalization	20.3%	—
LMArena Hard Prompts	—	1399

Math Not comparable

Mistral Medium 3.1: —, Solar Pro4: 38.8 (#128)

Math benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Math	—	1416

Knowledge Not comparable

Mistral Medium 3.1: —, Solar Pro4: 39.8 (#129)

Knowledge benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Expert	—	1427

Multilingual Not comparable

Mistral Medium 3.1: —, Solar Pro4: 48.7 (#139)

Multilingual benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Non-English	—	1361
LMArena Chinese	—	1415
LMArena French	—	1397
LMArena German	—	1364
LMArena Japanese	—	1309
LMArena Korean	—	1382
LMArena Russian	—	1360
LMArena Spanish	—	1401

Instruction Following Not comparable

Mistral Medium 3.1: —, Solar Pro4: 72.7 (#132)

Instruction Following benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Instruction Following	—	1377

Long Context Not comparable

Mistral Medium 3.1: —, Solar Pro4: 42.1 (#130)

Long Context benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Longer Query	—	1381

Writing & Preference Too close to call

Mistral Medium 3.1: 55.5 (#145), Solar Pro4: 56.5 (#138)

Writing & Preference benchmarks
Benchmark	Mistral Medium 3.1	Solar Pro4
LMArena Text	—	1386
LMArena Creative Writing	—	1316
EQ-Bench Creative Writing	1476	—
LMArena Multi-Turn	—	1385

Frequently asked questions

Is Mistral Medium 3.1 better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 42.1 to 31.9 on the Noometry Index.

Which is cheaper, Mistral Medium 3.1 or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Mistral Medium 3.1 lists at $0.40 and $2.

Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 131K.

How many benchmarks do Mistral Medium 3.1 and Solar Pro4 share?

0 benchmarks have published results for both models. Mistral Medium 3.1 has 3 scored results on Noometry and Solar Pro4 has 18.