Anthropic: Claude Haiku 4.5 vs OpenAI: o3
Side-by-side comparison of Anthropic: Claude Haiku 4.5 and OpenAI: o3. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
moderate confidenceAnthropic: Claude Haiku 4.5 and OpenAI: o3 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 Haiku 4.5
Best for with OpenAI: o3
Side-by-side
Technical specifications
| Anthropic: Claude Haiku 4.5 | OpenAI: o3 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $1/M | $2/M |
| Output price | $5/M | $8/M |
| Context window | 200K | 200K |
| Max output | 64K | 100K |
| Capabilities | Tool useVisionReasoning | Tool useVisionReasoning |
| Released | Oct 15, 2025 | Apr 16, 2025 |
Scoring breakdown
How each dimension compares
Price
Anthropic: Claude Haiku 4.5 leadsAnthropic: Claude Haiku 4.5
$5/M tokens
OpenAI: o3
$8/M tokens
Context Window
Anthropic: Claude Haiku 4.5
200K tokens
OpenAI: o3
200K tokens
Capabilities
Anthropic: Claude Haiku 4.5
3/4
OpenAI: o3
3/4
Max Output
OpenAI: o3 leadsAnthropic: Claude Haiku 4.5
64K tokens
OpenAI: o3
100K tokens
Recency
Anthropic: Claude Haiku 4.5
Oct 2025
OpenAI: o3
Apr 2025
Related comparisons