Claude Opus 4.5 vs o3 Deep Research (Comparative Analysis)
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Comparative Analysis: Claude Opus 4.5 vs. o3 Deep Research
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Overview
o3 Deep Research was released 1 month before Claude Opus 4.5.
 Claude Opus 4.5 |  o3 Deep Research | |
|---|---|---|
Model Provider The organization behind this AI's development | Anthropic | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 200K tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 64K tokens | 100K tokens |
Release Date When this model first became publicly available | November 24, 2025 7 months ago November 24th, 2025 | October 10, 2025 9 months ago October 10th, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Opus 4.5 | o3 Deep Research | |
|---|---|---|
Input Types Supported input formats | 📁File🖼️Image📝Text | 🖼️Image📝Text📁File |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Claude | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Pricing
Claude Opus 4.5 is roughly 0.5x less expensive compared to o3 Deep Research for input tokens and roughly 0.6x less expensive for output tokens.
| Claude Opus 4.5 | o3 Deep Research | |
|---|---|---|
Input Token Cost Cost per million input tokens | $5.00 per million tokens | $10.00 per million tokens |
Output Token Cost Cost per million output tokens | $25.00 per million tokens | $40.00 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | $0.01 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.50 per million tokens | $2.50 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 o3 Deep Research.
| Claude Opus 4.5 | o3 Deep Research | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,288 Elo (#20 in Game Dev (59.4% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes Claude Opus 4.5 and o3 Deep Research 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.o3 Deep Research by OpenAI 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 $10.00/M input and $40.00/M output tokens. Includes built-in content moderation for safer outputs. Released October 10th, 2025.Explore More Comparisons
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