Model comparison

GPT-5.2 Pro vs Phi-4

GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 31.2 on the Noometry Index. Phi-4 costs 660× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

Last verified October 11, 2026. 1 shared benchmarks.

GPT-5.2 Pro OpenAI

52.3

Rank #39 Reported

Phi-4

Microsoft

31.2

Rank #279 Confirmed

Summary

They share 1 benchmark with published results for both. GPT-5.2 Pro scores higher in 2 categories and Phi-4 in 0 categories; 2 gaps are clear of the uncertainty.
The widest gap is in math, where GPT-5.2 Pro leads 65.3 to 20.8.
Phi-4 is cheaper at $0.07 / $0.14 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
GPT-5.2 Pro accepts more context: 400K tokens versus 128K.
Phi-4 has downloadable open weights; the other is API-only.

Side by side

GPT-5.2 Pro and Phi-4 specifications
	GPT-5.2 Pro	Phi-4
Provider	OpenAI	Microsoft
Noometry Index	52.3	31.2
Released	2025-12-11	2024-12-11
Weights	Proprietary	Open
Context window	400K	128K
Max output	128K	4K
Input $ / M tokens	$21	$0.07
Output $ / M tokens	$168	$0.14
Results tracked	8	37

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Category by category

Coding Not comparable

GPT-5.2 Pro: —, Phi-4: 34.4 (#239)

Coding benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
BigCodeBench Instruct	—	45.5%
LiveBench Coding	—	30.7%
LMArena Coding	—	1231
BigCodeBench Complete	—	55.4%

Agentic & Tool Use Not comparable

GPT-5.2 Pro: —, Phi-4: 22.8 (#128)

Agentic & Tool Use benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
Berkeley Function Calling Leaderboard	—	28.8%
BALROG	—	11.6%

Reasoning GPT-5.2 Pro leads

GPT-5.2 Pro: 51.5 (#33), Phi-4: 17.7 (#291)

Reasoning benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
Epoch Capabilities Index	155.4	130.42
ARC-AGI-2	54.2%	—
SimpleBench	57.4%	—
NYT Connections (extended)	79.3%	—
ARC-AGI-1	90.5%	—
Chess Puzzles	—	1%
LiveBench Reasoning	—	47.8%
LMArena Hard Prompts	—	1220
LiveBench Data Analysis	—	45.2%
LiveBench	—	41.6%

Math GPT-5.2 Pro leads

GPT-5.2 Pro: 65.3 (#29), Phi-4: 20.8 (#285)

Math benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
FrontierMath (Tiers 1-3)	74%	—
FrontierMath Tier 4	46%	—
OTIS Mock AIME 2024-2025	—	13.8%
LiveBench Math	—	42%
LMArena Math	—	1246
MATH Level 5	—	64.9%
FrontierMath Tier 4 (v1)	31.3%	—

Knowledge Not comparable

GPT-5.2 Pro: —, Phi-4: 32.6 (#209)

Knowledge benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
GPQA Diamond	—	56.1%
Confabulations	—	29.4%
Vectara Hallucination Rate	—	3.7%
LMArena Expert	—	1203
MMLU	—	84.8%

Multilingual Not comparable

GPT-5.2 Pro: —, Phi-4: 37.2 (#237)

Multilingual benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
LMArena Non-English	—	1197
LMArena Chinese	—	1212
LMArena French	—	1224
LMArena German	—	1222
LMArena Japanese	—	1158
LMArena Korean	—	1151
LMArena Russian	—	1209
LMArena Spanish	—	1234

Instruction Following Not comparable

GPT-5.2 Pro: —, Phi-4: 60.4 (#251)

Instruction Following benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
LiveBench Instruction Following	—	58.4%
LMArena Instruction Following	—	1201

Long Context Not comparable

GPT-5.2 Pro: —, Phi-4: 36.9 (#226)

Long Context benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
LMArena Longer Query	—	1217

Writing & Preference Not comparable

GPT-5.2 Pro: —, Phi-4: 40.5 (#244)

Writing & Preference benchmarks
Benchmark	GPT-5.2 Pro	Phi-4
LMArena Text	—	1217
LMArena Creative Writing	—	1182
Short-Story Creative Writing	—	62.6%
LMArena Multi-Turn	—	1206
LiveBench Language	—	25.6%

Frequently asked questions

Is GPT-5.2 Pro better than Phi-4?

Which is cheaper, GPT-5.2 Pro or Phi-4?

Phi-4 is cheaper. It lists at $0.07 per million input tokens and $0.14 per million output tokens; GPT-5.2 Pro lists at $21 and $168.

Which has the bigger context window?

GPT-5.2 Pro does, with 400K tokens against 128K.

How many benchmarks do GPT-5.2 Pro and Phi-4 share?

1 benchmark has published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Phi-4 has 37.