Anthropic: Claude Haiku 4.5 (batch) vs OpenAI: o3 Pro (batch)
Head-to-head API pricing and cost comparison between Anthropic’s Anthropic: Claude Haiku 4.5 (batch) and OpenAI’s OpenAI: o3 Pro (batch). Prices auto-refresh daily from OpenRouter.
Anthropic: Claude Haiku 4.5 (batch) is 95% cheaper for input tokens; Anthropic: Claude Haiku 4.5 (batch) also wins on output tokens.
Side-by-side comparison
| Spec | Anthropic: Claude Haiku 4.5 (batch) | OpenAI: o3 Pro (batch) |
|---|---|---|
| Input price (per 1M) | $0.50 | $10.00 |
| Cached input (per 1M) | $0.05 | — |
| Output price (per 1M) | $2.50 | $40.00 |
| Batch input (per 1M) | $0.25 | $5.00 |
| Batch output (per 1M) | $1.25 | $20.00 |
| Reasoning price (per 1M) | — | — |
| Context window | 200K | 200K |
| Vision support | Yes | Yes |
| Caching support | Yes | No |
| Batch API | Yes | Yes |
| Reasoning capability | No | Yes |
Monthly cost at volume
Estimated monthly API spend at common production traffic levels (input/output tokens per request shown).
| Volume | Anthropic: Claude Haiku 4.5 (batch) | OpenAI: o3 Pro (batch) | Savings |
|---|---|---|---|
1K req/day 500in / 200out tokens | $22.50 | $390.00 | $367.50 Anthropic: Claude Haiku 4.5 (batch) wins |
10K req/day 1500in / 500out tokens | $600.00 | $10,500 | $9,900 Anthropic: Claude Haiku 4.5 (batch) wins |
100K req/day 3000in / 800out tokens | $10,500 | $186,000 | $175,500 Anthropic: Claude Haiku 4.5 (batch) wins |
1M req/day 8000in / 2000out tokens | $270,000 | $4,800,000 | $4,530,000 Anthropic: Claude Haiku 4.5 (batch) wins |
Adjust input/output token counts, request volume, batch & cached pricing.
Related comparisons
Frequently asked questions
Which is cheaper, Anthropic: Claude Haiku 4.5 (batch) or OpenAI: o3 Pro (batch)?
For input tokens, Anthropic: Claude Haiku 4.5 (batch) is roughly 95% cheaper at $0.50/1M vs $10.00/1M. For output tokens, Anthropic: Claude Haiku 4.5 (batch) wins at $2.50/1M. Real-world cost depends on your input/output ratio — use the calculator to model your actual workload.
What’s the context window difference?
Anthropic: Claude Haiku 4.5 (batch) has a context window of 200K tokens. OpenAI: o3 Pro (batch) offers 200K tokens. Larger context windows are valuable for long documents, RAG pipelines, and multi-turn conversations — but they come with higher input-token bills if you fill them every request.
Should I use Anthropic: Claude Haiku 4.5 (batch) or OpenAI: o3 Pro (batch)?
Choose Anthropic: Claude Haiku 4.5 (batch) if you’re already on the Anthropic stack, want broad ecosystem support, or prefer its lower input price. Choose OpenAI: o3 Pro (batch) for OpenAI’s ecosystem, native vision input, or its differentiated capabilities. Run a small benchmark on your own prompts before committing — price is only one axis.
How are these prices kept current?
Prices are pulled directly from OpenRouter’s public models API once every 24 hours via a Convex cron job, then normalized to per-1M-token figures. Last refresh: Aug 27, 2026.