Anthropic: Claude Haiku 4.5 vs OpenAI: o3 Mini
Side-by-side comparison of Anthropic: Claude Haiku 4.5 and OpenAI: o3 Mini. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
moderate confidenceOpenAI: o3 Mini leads overall
OpenAI: o3 Mini leads in price and max output, making it the stronger choice for most workflows. Anthropic: Claude Haiku 4.5 remains competitive with advantages in capabilities.
Best for with Anthropic: Claude Haiku 4.5
Best for with OpenAI: o3 Mini
Side-by-side
Technical specifications
| Anthropic: Claude Haiku 4.5 | OpenAI: o3 Mini | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $1/M | $1/M |
| Output price | $5/M | $4/M |
| Context window | 200K | 200K |
| Max output | 64K | 100K |
| Capabilities | Tool useVisionReasoning | Tool useReasoning |
| Released | Oct 15, 2025 | Jan 31, 2025 |
Scoring breakdown
How each dimension compares
Price
OpenAI: o3 Mini leadsAnthropic: Claude Haiku 4.5
$5/M tokens
OpenAI: o3 Mini
$4/M tokens
Context Window
Anthropic: Claude Haiku 4.5
200K tokens
OpenAI: o3 Mini
200K tokens
Capabilities
Anthropic: Claude Haiku 4.5 leadsAnthropic: Claude Haiku 4.5
3/4
OpenAI: o3 Mini
2/4
Max Output
OpenAI: o3 Mini leadsAnthropic: Claude Haiku 4.5
64K tokens
OpenAI: o3 Mini
100K tokens
Recency
Anthropic: Claude Haiku 4.5
Oct 2025
OpenAI: o3 Mini
Jan 2025
Related comparisons