Model comparison

GPT-5.4 nano vs Mistral Small 3.2

GPT-5.4 nano is the stronger model overall, scoring 41.9 to 30.8 on the Noometry Index. Mistral Small 3.2 costs 3.5× less per token, which makes it the better buy when GPT-5.4 nano's lead doesn't matter for your workload.

Last verified October 10, 2026. 5 shared benchmarks.

GPT-5.4 nano OpenAI

41.9

Rank #111 Confirmed

Mistral Small 3.2

Mistral AI

30.8

Rank #271 Confirmed

Summary

They share 5 benchmarks with published results for both. GPT-5.4 nano scores higher in 4 categories and Mistral Small 3.2 in 0 categories; 4 gaps are clear of the uncertainty.
The widest gap is in math, where GPT-5.4 nano leads 40.7 to 24.9.
The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 87.8% for GPT-5.4 nano and 30.3% for Mistral Small 3.2.
Mistral Small 3.2 is cheaper at $0.0938 / $0.25 per million input/output tokens, against $0.20 / $1.25 for GPT-5.4 nano.
GPT-5.4 nano accepts more context: 400K tokens versus 256K.
Mistral Small 3.2 has downloadable open weights; the other is API-only.

Side by side

GPT-5.4 nano and Mistral Small 3.2 specifications
	GPT-5.4 nano	Mistral Small 3.2
Provider	OpenAI	Mistral AI
Noometry Index	41.9	30.8
Released	2026-03-17	2025-06-20
Weights	Proprietary	Open
Context window	400K	256K
Max output	128K	16K
Input $ / M tokens	$0.20	$0.0938
Output $ / M tokens	$1.25	$0.25
Results tracked	40	6

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Not comparable

GPT-5.4 nano: 43.1 (#82), Mistral Small 3.2: —

Coding benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
SciCode	46.9%	—
WeirdML	49.2%	—
LMArena Coding	1404	—
ALE-Bench	1,005	—

Reasoning GPT-5.4 nano leads

GPT-5.4 nano: 23.8 (#159), Mistral Small 3.2: 17.5 (#282)

Reasoning benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
Kagi LLM Benchmark	39.7%	40.4%
Chess Puzzles	30%	1%
Epoch Capabilities Index	145.78	131.73
ARC-AGI-2	5.7%	—
ARC-AGI-1	51.5%	—
CritPt	9.3%	—
LMArena Hard Prompts	1380	—
Mystery Game Puzzles	9%	—
DTBench	80.3%	—
LMCA	36.9%	—
ForecastBench	57.3	—

Math GPT-5.4 nano leads

GPT-5.4 nano: 40.7 (#76), Mistral Small 3.2: 24.9 (#251)

Math benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
OTIS Mock AIME 2024-2025	87.8%	30.3%
FrontierMath (Tiers 1-3)	44.9%	—
FrontierMath Tier 4	12.2%	—
ProofBench	5%	—
LMArena Math	1406	—
FrontierMath (Feb 2025 set)	25.9%	—
FrontierMath Tier 4 (v1)	6.3%	—

Knowledge GPT-5.4 nano leads

GPT-5.4 nano: 41.8 (#94), Mistral Small 3.2: 26.8 (#249)

Knowledge benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
GPQA Diamond	78.5%	49.1%
SimpleQA Verified	11.7%	—
Vectara Hallucination Rate	3.1%	—
LMArena Expert	1397	—

Multimodal Not comparable

GPT-5.4 nano: 36.0 (#73), Mistral Small 3.2: —

Multimodal benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
LMArena Vision	1196	—

Multilingual Not comparable

GPT-5.4 nano: 48.8 (#136), Mistral Small 3.2: —

Multilingual benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
LMArena Non-English	1359	—
LMArena Chinese	1391	—
LMArena French	1396	—
LMArena German	1368	—
LMArena Japanese	1342	—
LMArena Korean	1321	—
LMArena Russian	1363	—
LMArena Spanish	1368	—

Instruction Following Not comparable

GPT-5.4 nano: 72.1 (#139), Mistral Small 3.2: —

Instruction Following benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
LMArena Instruction Following	1362	—

Long Context Not comparable

GPT-5.4 nano: 41.6 (#131), Mistral Small 3.2: —

Long Context benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
LMArena Longer Query	1365	—

Writing & Preference GPT-5.4 nano leads

GPT-5.4 nano: 55.9 (#137), Mistral Small 3.2: 45.1 (#219)

Writing & Preference benchmarks
Benchmark	GPT-5.4 nano	Mistral Small 3.2
LMArena Text	1372	—
LMArena Creative Writing	1313	—
EQ-Bench Creative Writing	—	1255
LMArena Multi-Turn	1382	—

Frequently asked questions

Is GPT-5.4 nano better than Mistral Small 3.2?

Which is cheaper, GPT-5.4 nano or Mistral Small 3.2?

Mistral Small 3.2 is cheaper. It lists at $0.0938 per million input tokens and $0.25 per million output tokens; GPT-5.4 nano lists at $0.20 and $1.25.

Which has the bigger context window?

GPT-5.4 nano does, with 400K tokens against 256K.

How many benchmarks do GPT-5.4 nano and Mistral Small 3.2 share?

5 benchmarks have published results for both models. GPT-5.4 nano has 40 scored results on Noometry and Mistral Small 3.2 has 6.