Claude Haiku 4.5 vs GPT-5.5 Pro
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Claude Haiku 4.5
Anthropic · Oct 2025
Anthropic's fast tier: Sonnet-4-class coding performance at $1/$5 and more than twice the speed.
GPT-5.5 Pro
OpenAI · Apr 2026
The maximum-compute tier of GPT-5.5 for the hardest research, math and engineering problems, at a steep per-token premium.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Claude Haiku 4.5 works out roughly 34x cheaper per blended million tokens. GPT-5.5 Pro also takes 1M of context versus 200K for Claude Haiku 4.5.
Specs & pricing
| Claude Haiku 4.5 | GPT-5.5 Pro | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $1 | $30 |
| Output price / 1M | $5 | $180 |
| Context window | 200K | 1M |
| Max output | 64K | 128K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Feb 2025 | Jan 2026 |
| Released | Oct 2025 | Apr 2026 |
| Example monthly cost* | $17.50 | $570.00 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Claude Haiku 4.5 or GPT-5.5 Pro?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: Claude Haiku 4.5 works out roughly 34x cheaper per blended million tokens. GPT-5.5 Pro also takes 1M of context versus 200K for Claude Haiku 4.5.
- Which is cheaper, Claude Haiku 4.5 or GPT-5.5 Pro?
- Claude Haiku 4.5 costs $1/$5 per million input/output tokens, while GPT-5.5 Pro costs $30/$180. For a typical workload of 10M input and 1.5M output tokens per month, that's $17.50 versus $570.00.
- Which model is better for coding, Claude Haiku 4.5 or GPT-5.5 Pro?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
More comparisons
Claude Haiku 4.5 vs GPT-5.5GPT-5.5 Pro vs GPT-5.5Claude Haiku 4.5 vs GPT-5.2GPT-5.5 Pro vs GPT-5.2Claude Haiku 4.5 vs GPT-5.1GPT-5.5 Pro vs GPT-5.1Claude Haiku 4.5 vs GPT-5GPT-5.5 Pro vs GPT-5Claude Haiku 4.5 vs GPT-5 miniGPT-5.5 Pro vs GPT-5 miniClaude Haiku 4.5 vs OpenAI o3GPT-5.5 Pro vs OpenAI o3