ChatGPT vs Claude (2026)
The two most popular AI assistants — GPT-4o vs Claude Sonnet 4.6 — compared across 10 real-world categories so you can pick the right one for your needs.
Claude wins more categories and excels at the tasks most people use AI for — coding, writing, and analysing long documents. ChatGPT is the better choice if you need real-time web access, strong maths, or deep third-party integrations.
Category Breakdown
Claude Sonnet scores 93.7% on HumanEval vs GPT-4o's 90.2%. Claude also handles larger codebases better with its 200K context window.
Claude consistently scores higher in blind writing quality tests. Its prose feels more natural and less 'AI-generated'.
GPT-4o scores 76.6% on MATH vs Claude's 71.1%. OpenAI's o1 model goes even further with 96.4% — the clear winner for advanced maths.
Both handle images well. GPT-4o has a slight edge on visual reasoning tasks; Claude is better at following instructions about images.
Claude: 200K tokens. GPT-4o: 128K tokens. For large documents and long conversations, Claude wins clearly.
GPT-4o: $2.50/1M input. Claude Sonnet: $3.00/1M input. GPT-4o is slightly cheaper, though Claude's prompt caching can narrow the gap significantly.
Both offer free tiers. ChatGPT Free includes GPT-4o with daily limits. Claude.ai Free includes Claude Sonnet with message limits.
ChatGPT has Bing-powered web browsing. Claude does not have real-time web access by default.
ChatGPT has a larger plugin ecosystem and deeper integrations with Microsoft 365, Zapier, and third-party tools.
Anthropic's Constitutional AI training makes Claude more predictable and less likely to go off-script in production deployments.
Specs at a Glance
| GPT-4o | Claude Sonnet 4.6 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Context window | 128K tokens | 200K tokens |
| API input price | $2.50 / 1M | $3.00 / 1M |
| API output price | $10.00 / 1M | $15.00 / 1M |
| MMLU benchmark | 88.7% | 88.7% |
| HumanEval (coding) | 90.2% | 93.7% |
| MATH benchmark | 76.6% | 71.1% |
| Multimodal | Yes | Yes |
| Web browsing | Yes | No |
| Free tier | Yes | Yes |
When to Use Each
- Real-time web search
- Advanced maths (use o1)
- Microsoft 365 integration
- Third-party plugins
- Image generation (DALL-E 3)
- Best coding assistant
- Long document analysis
- Consistent brand voice
- Production AI safety
- Large context (200K)
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