Claude Sonnet 4.5 vs phi-4
At a Glance
| Compare | Claude Sonnet 4.5Anthropic |  phi-4Microsoft |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #36 of 4627.7 score · 2/3 sources · provisional · missing LiveBench · full-core range 18.5–51.8 | UnrankedNot in the 46-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $3.00Anthropic ↗ · Sep 3, 2026 | $0.070Deepinfra ↗ · Sep 21, 2026 |
| Output priceFrom · USD / 1M tokens | $15.00Anthropic ↗ · Sep 3, 2026 | $0.14Deepinfra ↗ · Sep 21, 2026 |
| Context windowMaximum documented tokens | 200K | 16K |
| Model facts checked | Sep 3, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Claude Sonnet 4.5 | phi-4 |
|---|---|---|
| Berkeley Function Calling Leaderboardv4-ede5081a24bc · overall_accuracy · leader | 24.9086% of row best · percent · Claude-Sonnet-4-5-20250929 (Prompt) | 28.79100% of row best · percent · Phi-4 (Prompt) |
| LMArena Text Arenatext-2026-09-13-d25aabda0010 · arena_rating · leader | 1,433.94100% of row best · rating · claude-sonnet-4-5-20250929-high-32k; 95% CI [1431.13982742, 1436.74901697]; votes 80980; rank 81 | 1,216.6085% of row best · rating · phi-4; 95% CI [1212.02298793, 1221.18318193]; votes 24126; rank 300 |
| Overall ResultCounted from the protocol-matched rows above | 1 benchmark winNo overall winner | 1 benchmark winNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Claude Sonnet 4.5 | phi-4 |
|---|---|---|
| Developer | Anthropic | Microsoft |
| Family | Claude 4 | Phi 4 |
| Model | Claude Sonnet 4.5 | phi-4 |
| Version | Claude Sonnet 4.5 | phi-4 |
| Lifecycle | active | active |
| Released | 2025-09-29 | 2024-12-12 |
| Knowledge cutoff | 2025-01-01 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 200K | 16K |
| Total parameters | Unknown | 14.7B |
| Active parameters | Unknown | Unknown |
| License | Unknown | mit |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Anthropic (Standard) | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation |
Claude Sonnet 4.5 Capabilities
phi-4 Capabilities
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 MiniMax-M3MiniMax | vs | Claude Sonnet 4.5Anthropic | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Claude Sonnet 4.5Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Claude Sonnet 4.5Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.5 vs phi-4 FAQs
Is Claude Sonnet 4.5 or phi-4 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.5 and phi-4, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.5 or phi-4?+
Claude Sonnet 4.5 is $3.00 and phi-4 is $0.070 per million tokens, so phi-4 is cheaper on this metric. Claude Sonnet 4.5 is $15.00 and phi-4 is $0.14 per million tokens, so phi-4 is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.5 or phi-4?+
Claude Sonnet 4.5 has the larger sourced context window. Claude Sonnet 4.5 supports 200K and phi-4 supports 16K.
Which performs better in benchmarks, Claude Sonnet 4.5 or phi-4?+
There is no overall benchmark winner: The verified common benchmarks do not produce a majority winner.
Can Claude Sonnet 4.5 or phi-4 be self-hosted?+
phi-4 is the only model in this pair currently marked as self-hostable. Claude Sonnet 4.5 is not marked open weight; phi-4 is open weight.
Can Claude Sonnet 4.5 and phi-4 understand images?+
Claude Sonnet 4.5 is documented with image input; phi-4 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.5 or phi-4?+
Neither has a larger sourced maximum output. Claude Sonnet 4.5 is 64K and phi-4 is —.
Do Claude Sonnet 4.5 and phi-4 support reasoning and tool use?+
Claude Sonnet 4.5: reasoning, tool calling, and image input. phi-4: none of these features are definitively sourced. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.5 or phi-4?+
Claude Sonnet 4.5 has 1 sourced provider route; phi-4 has 3, so phi-4 has broader tracked availability.
Which offers better value, Claude Sonnet 4.5 or phi-4?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.