Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 4.5 vs Phi 4
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 4.5 wins on 3/3 benchmarks
Claude Sonnet 4.5 wins 3 of 3 shared benchmarks. Leads in knowledge · math.
Category leads
knowledge·Claude Sonnet 4.5math·Claude Sonnet 4.5
Hype vs Reality
Attention vs performance
Claude Sonnet 4.5
#130 by perf·no signal
Phi 4
#124 by perf·no signal
Best value
Phi 4
90.1x better value than Claude Sonnet 4.5
Claude Sonnet 4.5
4.7 pts/$
$9.00/M
Phi 4
421.5 pts/$
$0.10/M
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
Microsoft
$3.00T·Big Tech
Head to head
3 benchmarks · 2 models
Claude Sonnet 4.5Phi 4
GPQA diamond
Claude Sonnet 4.5 leads by +35.0
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Sonnet 4.5
76.4
Phi 4
41.4
MATH level 5
Claude Sonnet 4.5 leads by +32.8
MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics.
Claude Sonnet 4.5
97.7
Phi 4
64.9
OTIS Mock AIME 2024-2025
Claude Sonnet 4.5 leads by +64.1
OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Sonnet 4.5
77.8
Phi 4
13.7
Full benchmark table
| Benchmark | Claude Sonnet 4.5 | Phi 4 |
|---|---|---|
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 76.4 | 41.4 |
MATH level 5 MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics. | 97.7 | 64.9 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 77.8 | 13.7 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Claude Sonnet 4.5 | $3.00 | $15.00 | 1.0M tokens (~500 books) | $60.00 |
| Phi 4 | $0.07 | $0.14 | 16K tokens (~8 books) | $0.84 |