Claude Sonnet 4.5 vs DeepSeek V3
At a Glance
| Compare | Claude Sonnet 4.5Anthropic |  DeepSeek V3DeepSeek |
|---|---|---|
| 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 | $0.2574Openrouter ↗ · Aug 29, 2026 |
| Output priceFrom · USD / 1M tokens | $15.00Anthropic ↗ · Sep 3, 2026 | $0.89Deepinfra ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 200K | 164K |
| 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 | DeepSeek-V3 |
|---|---|---|
| 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 | 1,332.3993% of row best · rating · deepseek-v3; 95% CI [1327.66209525, 1337.12686082]; votes 21770; rank 209 |
| Overall ResultCounted from the protocol-matched rows above | 1 benchmark winNo overall winner | 0 benchmark winsNo 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 | DeepSeek-V3 |
|---|---|---|
| Developer | Anthropic | DeepSeek |
| Family | Claude 4 | Deepseek V3 |
| Model | Claude Sonnet 4.5 | DeepSeek-V3 |
| Version | Claude Sonnet 4.5 | DeepSeek-V3 |
| Lifecycle | active | active |
| Released | 2025-09-29 | 2024-12-26 |
| Knowledge cutoff | 2025-01-01 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 200K | 164K |
| Total parameters | Unknown | 684.5B |
| Active parameters | Unknown | 37B |
| License | Unknown | Unknown |
| 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
DeepSeek V3 Capabilities
Related Comparisons
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|---|---|---|---|
Claude Sonnet 4.5Anthropic | vs |  GPT-6 AstraOpenAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs | Claude Sonnet 4.5Anthropic | family variantsimage, text |
Claude Sonnet 4.5Anthropic | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Claude Sonnet 4.5Anthropic | vs | DeepSeek-V4.1-FlashDeepSeek | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
 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 DeepSeek V3 FAQs
Is Claude Sonnet 4.5 or DeepSeek V3 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.5 and DeepSeek V3, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.5 or DeepSeek V3?+
Claude Sonnet 4.5 is $3.00 and DeepSeek V3 is $0.2574 per million tokens, so DeepSeek V3 is cheaper on this metric. Claude Sonnet 4.5 is $15.00 and DeepSeek V3 is $0.89 per million tokens, so DeepSeek V3 is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.5 or DeepSeek V3?+
Claude Sonnet 4.5 has the larger sourced context window. Claude Sonnet 4.5 supports 200K and DeepSeek V3 supports 164K.
Which performs better in benchmarks, Claude Sonnet 4.5 or DeepSeek V3?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Sonnet 4.5 or DeepSeek V3 be self-hosted?+
DeepSeek V3 is the only model in this pair currently marked as self-hostable. Claude Sonnet 4.5 is not marked open weight; DeepSeek V3 is open weight.
Can Claude Sonnet 4.5 and DeepSeek V3 understand images?+
Claude Sonnet 4.5 is documented with image input; DeepSeek V3 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.5 or DeepSeek V3?+
Neither has a larger sourced maximum output. Claude Sonnet 4.5 is 64K and DeepSeek V3 is —.
Do Claude Sonnet 4.5 and DeepSeek V3 support reasoning and tool use?+
Claude Sonnet 4.5: reasoning, tool calling, and image input. DeepSeek V3: 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 DeepSeek V3?+
Claude Sonnet 4.5 has 1 sourced provider route; DeepSeek V3 has 3, so DeepSeek V3 has broader tracked availability.
Which offers better value, Claude Sonnet 4.5 or DeepSeek V3?+
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.