Claude Opus 4.5 vs DeepSeek V4 Flash 0423 (Comparative Analysis)
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Comparative Analysis: Claude Opus 4.5 vs. DeepSeek V4 Flash 0423
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Overview
Claude Opus 4.5 was released 5 months before DeepSeek V4 Flash 0423.
 Claude Opus 4.5 |  DeepSeek V4 Flash 0423 | |
|---|---|---|
Model Provider The organization behind this AI's development | Anthropic | DeepSeek |
Input Context Window Maximum input tokens this model can process at once | 200K tokens | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | 64K tokens | 393.2K tokens |
Release Date When this model first became publicly available | November 24, 2025 8 months ago November 24th, 2025 | April 24, 2026 3 months ago April 24th, 2026 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Opus 4.5 | DeepSeek V4 Flash 0423 | |
|---|---|---|
Input Types Supported input formats | 📁File🖼️Image📝Text | 📝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 Calling✓Structured Output✓Reasoning Mode✓Content Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Open Source Model availability | Proprietary | Available on HuggingFace → |
Pricing
Claude Opus 4.5 is roughly 35.7x more expensive compared to DeepSeek V4 Flash 0423 for input tokens and roughly 89.3x more expensive for output tokens.
| Claude Opus 4.5 | DeepSeek V4 Flash 0423 | |
|---|---|---|
Input Token Cost Cost per million input tokens | $5.00 per million tokens | $0.14 per million tokens |
Output Token Cost Cost per million output tokens | $25.00 per million tokens | $0.28 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 | $0.50 per million tokens | $0.03 per million tokens |
Cache Write Cost Cost to write input tokens to the cache | $6.25 per million tokens | Not specified |
1-Hour Cache Write Cost Cost to cache input tokens for one hour | $10.00 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Claude Opus 4.5 and DeepSeek V4 Flash 0423.
| Claude Opus 4.5 | DeepSeek V4 Flash 0423 | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,272 Elo (#28 in UI Component (58.5% win rate)) | 1,242 Elo (#37 in 3D (49.3% win rate)) |
At a Glance
Quick overview of what makes Claude Opus 4.5 and DeepSeek V4 Flash 0423 unique.
Claude Opus 4.5 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Premium pricing at $5.00/M input and $25.00/M output tokens. Includes built-in content moderation for safer outputs. Released November 24th, 2025.DeepSeek V4 Flash 0423 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 $0.14/M input and $0.28/M output tokens. Released April 24th, 2026.Explore More Comparisons
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