Noometry

Model comparison

Claude Opus 4.1 vs Phi-4 Mini

Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 30.9 on the Noometry Index. Phi-4 Mini costs 229× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.

Last verified . 1 shared benchmarks.

Claude Opus 4.1 Anthropic

41.0

Rank #142 Confirmed

Phi-4 Mini Microsoft

30.9

Rank #283 Reported

Summary

  • They share 1 benchmark with published results for both. Claude Opus 4.1 scores higher in 3 categories and Phi-4 Mini in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Claude Opus 4.1 leads 42.0 to 25.3.
  • The biggest single-benchmark swing is Vectara Hallucination Rate: 11.8% for Claude Opus 4.1 and 23.5% for Phi-4 Mini.
  • Phi-4 Mini is cheaper at $0.075 / $0.30 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
  • Claude Opus 4.1 accepts more context: 200K tokens versus 128K.
  • Phi-4 Mini has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.1Phi-4 Mini
ProviderAnthropicMicrosoft
Noometry Index41.030.9
Released2025-08-052024-12-11
WeightsProprietaryOpen
Context window200K128K
Max output32K4K
Input $ / M tokens$15$0.075
Output $ / M tokens$75$0.30
Results tracked483

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Category by category

Coding Claude Opus 4.1 leads

Claude Opus 4.1: 44.4 (#73), Phi-4 Mini: 28.1 (#317)

BenchmarkClaude Opus 4.1Phi-4 Mini
SWE-bench Verified73.3%—
LMArena WebDev1390—
SciCode—10.8%
WeirdML45.9%—
LMArena Coding1479—
ALE-Bench674.77—
AlgoTune1.34—

Agentic & Tool Use Not comparable

Claude Opus 4.1: 35.0 (#41), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
Terminal-Bench38%—
GDPval43.6%—
Cybench42%—
DeepResearch Bench48.3%—
LMArena Search1148—
METR Time Horizons66.8%—

Reasoning Claude Opus 4.1 leads

Claude Opus 4.1: 32.2 (#76), Phi-4 Mini: 22.4 (#195)

BenchmarkClaude Opus 4.1Phi-4 Mini
SimpleBench60%—
CritPt—0%
Chess Puzzles7%—
EnigmaEval7.2%—
EBR-Bench7.9%—
LMArena Hard Prompts1443—
Mystery Game Puzzles21%—
DTBench80%—
LMCA37.1%—
Epoch Capabilities Index144.12—
ForecastBench62—

Math Not comparable

Claude Opus 4.1: 22.3 (#277), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
FrontierMath (Tiers 1-3)12.6%—
FrontierMath Tier 42.4%—
OTIS Mock AIME 2024-202568.9%—
LMArena Math1431—
FrontierMath (Feb 2025 set)7.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Opus 4.1 leads

Claude Opus 4.1: 42.0 (#101), Phi-4 Mini: 25.3 (#262)

BenchmarkClaude Opus 4.1Phi-4 Mini
Vectara Hallucination Rate11.8%23.5%
GPQA Diamond77.3%—
Humanity's Last Exam11.5%—
Confabulations17.1%—
LMArena Expert1439—

Multimodal Not comparable

Claude Opus 4.1: 26.8 (#119), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
VPCT35%—

Multilingual Not comparable

Claude Opus 4.1: 52.0 (#95), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
LMArena Non-English1405—
LMArena Chinese1427—
LMArena French1431—
LMArena German1413—
LMArena Japanese1378—
LMArena Korean1380—
LMArena Russian1422—
LMArena Spanish1448—

Instruction Following Not comparable

Claude Opus 4.1: 75.6 (#58), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
LMArena Instruction Following1435—

Long Context Not comparable

Claude Opus 4.1: 44.5 (#63), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
LMArena Longer Query1455—

Writing & Preference Not comparable

Claude Opus 4.1: 62.4 (#74), Phi-4 Mini: —

BenchmarkClaude Opus 4.1Phi-4 Mini
LMArena Text1419—
LMArena Creative Writing1412—
Short-Story Creative Writing84.7%—
LMArena Multi-Turn1444—

Frequently asked questions

Is Claude Opus 4.1 better than Phi-4 Mini?

Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 30.9 on the Noometry Index. Phi-4 Mini costs 229× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.1 or Phi-4 Mini?

Phi-4 Mini is cheaper. It lists at $0.075 per million input tokens and $0.30 per million output tokens; Claude Opus 4.1 lists at $15 and $75.

Is Claude Opus 4.1 or Phi-4 Mini better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 28.1 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 4.1 does, with 200K tokens against 128K.

How many benchmarks do Claude Opus 4.1 and Phi-4 Mini share?

1 benchmark has published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Phi-4 Mini has 3.

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