Claude Sonnet 4.5 vs R1 0528 (Comparative Analysis)
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Comparative Analysis: Claude Sonnet 4.5 vs. R1 0528
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Overview
R1 0528 was released 4 months before Claude Sonnet 4.5.
 Claude Sonnet 4.5 |  R1 0528 | |
|---|---|---|
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 | 163.8K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 64K tokens | 32.8K tokens |
Release Date When this model first became publicly available | September 29, 2025 10 months ago September 29th, 2025 | May 28, 2025 1 year ago May 28th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | January 31, 2025 | March 31, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Sonnet 4.5 | R1 0528 | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image📁File | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Always enabled |
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 Sonnet 4.5 is roughly 6.0x more expensive compared to R1 0528 for input tokens and roughly 7.0x more expensive for output tokens.
| Claude Sonnet 4.5 | R1 0528 | |
|---|---|---|
Short Context Pricing Base rates before a long-context threshold applies | ||
Input Token Cost Cost per million input tokens | $3.00 per million tokens | $0.50 per million tokens |
Output Token Cost Cost per million output tokens | $15.00 per million tokens | $2.15 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 | $0.35 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 4.5 and R1 0528.
| Claude Sonnet 4.5 | R1 0528 | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 36.4 (Artificial Analysis index; higher is better) | Benchmark not available. |
Coding Index Programming performance across independent evaluations | 52.1 (Artificial Analysis index; higher is better) | Benchmark not available. |
Agentic Index Ability to complete multi-step agentic tasks | 24.6 (Artificial Analysis index; higher is better) | Benchmark not available. |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,243 Elo (#11 in Asciiart (56.3% win rate)) | 1,208 Elo (#44 in Data Viz (60.7% win rate)) |
At a Glance
Quick overview of what makes Claude Sonnet 4.5 and R1 0528 unique.
Claude Sonnet 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 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 September 29th, 2025.R1 0528 by DeepSeek can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 163.8K token context window. Reasonably priced at $0.50/M input and $2.15/M output tokens. Released May 28th, 2025.Explore More Comparisons
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Compare R1 0528 with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
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