Claude Sonnet 4 vs DeepSeek V4 Flash (Comparative Analysis)
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Comparative Analysis: Claude Sonnet 4 vs. DeepSeek V4 Flash
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Overview
Claude Sonnet 4 was released 11 months before DeepSeek V4 Flash.
 Claude Sonnet 4 |  DeepSeek V4 Flash | |
|---|---|---|
Model Provider The organization behind this AI's development | Anthropic | DeepSeek |
Input Context Window Maximum input tokens this model can process at once | 1M tokens | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | 64K tokens | Not specified tokens |
Release Date When this model first became publicly available | May 22, 2025 1 year ago May 22nd, 2025 | April 24, 2026 3 months ago April 24th, 2026 |
Knowledge Cutoff Latest training-data date reported by the provider | January 31, 2025 | Not reported |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Sonnet 4 | DeepSeek V4 Flash | |
|---|---|---|
Input Types Supported input formats | 🖼️Image📝Text📁File | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | OptionalEffort: Extra High, HighDefault: High |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Claude | DeepSeek |
Key Features Advanced capabilities | ✓Function CallingStructured Output✓Reasoning Mode✓Content Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Open Source Model availability | Proprietary | Available on HuggingFace → |
Pricing
Claude Sonnet 4 is roughly 33.3x more expensive compared to DeepSeek V4 Flash for input tokens and roughly 78.9x more expensive for output tokens.
| Claude Sonnet 4 | DeepSeek V4 Flash | |
|---|---|---|
Short Context Pricing Base rates before a long-context threshold applies | ||
Input Token Cost Cost per million input tokens | $3.00 per million tokens | $0.09 per million tokens |
Output Token Cost Cost per million output tokens | $15.00 per million tokens | $0.19 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | Not specified |
Cache Read Cost Cost to reuse cached input tokens | $0.30 per million tokens | $0.02 per million tokens |
Cache Write Cost Cost to write input tokens to the cache | $3.75 per million tokens | Not specified |
1-Hour Cache Write Cost Cost to cache input tokens for one hour | $6.00 per million tokens | Not specified |
Long Context Pricing Rates for prompts with 200,000 or more tokens | ||
Input Token Cost Long-context input cost per million tokens | $6.00 per million tokens | Not specified |
Output Token Cost Long-context output cost per million tokens | $22.50 per million tokens | Not specified |
Cache Read Cost Long-context cache read cost per million tokens | $0.60 per million tokens | Not specified |
Cache Write Cost Long-context cache write cost per million tokens | $7.50 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Claude Sonnet 4 and DeepSeek V4 Flash.
| Claude Sonnet 4 | DeepSeek V4 Flash | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 28.9 (Artificial Analysis index; higher is better) | 40.3 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | 37.6 (Artificial Analysis index; higher is better) | 56.2 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | 16.6 (Artificial Analysis index; higher is better) | 31.1 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,198 Elo (#46 in 3D (57.8% win rate)) | 1,254 Elo (#32 in Game Dev (50.4% win rate)) |
At a Glance
Quick overview of what makes Claude Sonnet 4 and DeepSeek V4 Flash unique.
Claude Sonnet 4 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning. It can handle standard conversations with its 1M token context window. Premium pricing at $3.00/M input and $15.00/M output tokens. Includes built-in content moderation for safer outputs. Released May 22nd, 2025.DeepSeek V4 Flash by DeepSeek can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Very affordable at $0.09/M input and $0.19/M output tokens. Released April 24th, 2026.Explore More Comparisons
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