Anthropic: Claude Sonnet 4 vs OpenAI: o3 Deep Research
Side-by-side comparison of Anthropic: Claude Sonnet 4 and OpenAI: o3 Deep Research. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
moderate confidenceAnthropic: Claude Sonnet 4 and OpenAI: o3 Deep Research are closely matched across pricing, context, and capabilities. Your choice depends on workflow-specific factors like provider ecosystem preference and existing integrations.
Best for with Anthropic: Claude Sonnet 4
Best for with OpenAI: o3 Deep Research
Side-by-side
Technical specifications
| Anthropic: Claude Sonnet 4 | OpenAI: o3 Deep Research | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $3/M | $10/M |
| Output price | $15/M | $40/M |
| Context window | 200K | 200K |
| Max output | 64K | 100K |
| Capabilities | Tool useVisionReasoning | Tool useVisionReasoning |
| Released | May 22, 2025 | Oct 10, 2025 |
Scoring breakdown
How each dimension compares
Price
Anthropic: Claude Sonnet 4 leadsAnthropic: Claude Sonnet 4
$15/M tokens
OpenAI: o3 Deep Research
$40/M tokens
Context Window
Anthropic: Claude Sonnet 4
200K tokens
OpenAI: o3 Deep Research
200K tokens
Capabilities
Anthropic: Claude Sonnet 4
3/4
OpenAI: o3 Deep Research
3/4
Max Output
OpenAI: o3 Deep Research leadsAnthropic: Claude Sonnet 4
64K tokens
OpenAI: o3 Deep Research
100K tokens
Recency
Anthropic: Claude Sonnet 4
May 2025
OpenAI: o3 Deep Research
Oct 2025
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