Claude Opus 4 vs GPT-5 Nano (Comparative Analysis)
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Comparative Analysis: Claude Opus 4 vs. GPT-5 Nano
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Overview
Claude Opus 4 was released 2 months before GPT-5 Nano.
 Claude Opus 4 |  GPT-5 Nano | |
|---|---|---|
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 | 400K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 32K tokens | 128K tokens |
Release Date When this model first became publicly available | May 22, 2025 1 year ago May 22nd, 2025 | August 7, 2025 1 year ago August 7th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | January 31, 2025 | May 31, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Opus 4 | GPT-5 Nano | |
|---|---|---|
Input Types Supported input formats | 🖼️Image📝Text📁File | 📝Text🖼️Image📁File |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Always enabledEffort: High, Medium, Low, MinimalDefault: Medium |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Claude | GPT |
Key Features Advanced capabilities | ✓Function CallingStructured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Pricing
Claude Opus 4 is roughly 300.0x more expensive compared to GPT-5 Nano for input tokens and roughly 187.5x more expensive for output tokens.
| Claude Opus 4 | GPT-5 Nano | |
|---|---|---|
Input Token Cost Cost per million input tokens | $15.00 per million tokens | $0.05 per million tokens |
Output Token Cost Cost per million output tokens | $75.00 per million tokens | $0.40 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 | $1.50 per million tokens | $0.0050 per million tokens |
Cache Write Cost Cost to write input tokens to the cache | $18.75 per million tokens | Not specified |
1-Hour Cache Write Cost Cost to cache input tokens for one hour | $30.00 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Claude Opus 4 and GPT-5 Nano.
| Claude Opus 4 | GPT-5 Nano | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,212 Elo (#44 in Game Dev (59.9% win rate)) | 1,123 Elo (#86 in Website (48.9% win rate)) |
At a Glance
Quick overview of what makes Claude Opus 4 and GPT-5 Nano unique.
Claude Opus 4 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning. It can handle standard conversations with its 200K token context window. Premium pricing at $15.00/M input and $75.00/M output tokens. Released May 22nd, 2025.GPT-5 Nano 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 400K token context window. Very affordable at $0.05/M input and $0.40/M output tokens. Includes built-in content moderation for safer outputs. Released August 7th, 2025.Explore More Comparisons
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Compare GPT-5 Nano with:
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Models optimized for creative writing
📢Marketing
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💻Technology
Technical analysis and explanations
🔬Science
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