Anthropic: Claude 3.5 Sonnet vs OpenAI: o3 Deep Research
Side-by-side comparison of Anthropic: Claude 3.5 Sonnet and OpenAI: o3 Deep Research. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceOpenAI: o3 Deep Research leads overall
OpenAI: o3 Deep Research leads in capabilities and max output, making it the stronger choice for most workflows. Anthropic: Claude 3.5 Sonnet remains competitive with advantages in price.
Best for with Anthropic: Claude 3.5 Sonnet
Best for with OpenAI: o3 Deep Research
Side-by-side
Technical specifications
| Anthropic: Claude 3.5 Sonnet | OpenAI: o3 Deep Research | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $6/M | $10/M |
| Output price | $30/M | $40/M |
| Context window | 200K | 200K |
| Max output | 8K | 100K |
| Capabilities | Tool useVision | Tool useVisionReasoning |
| Released | Oct 21, 2024 | Oct 10, 2025 |
Scoring breakdown
How each dimension compares
Price
Anthropic: Claude 3.5 Sonnet leadsAnthropic: Claude 3.5 Sonnet
$30/M tokens
OpenAI: o3 Deep Research
$40/M tokens
Context Window
Anthropic: Claude 3.5 Sonnet
200K tokens
OpenAI: o3 Deep Research
200K tokens
Capabilities
OpenAI: o3 Deep Research leadsAnthropic: Claude 3.5 Sonnet
2/4
OpenAI: o3 Deep Research
3/4
Max Output
OpenAI: o3 Deep Research leadsAnthropic: Claude 3.5 Sonnet
8K tokens
OpenAI: o3 Deep Research
100K tokens
Recency
Anthropic: Claude 3.5 Sonnet
Oct 2024
OpenAI: o3 Deep Research
Oct 2025
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