Claude Haiku 4.5 vs GPT-5
Pricing, benchmarks, and use case comparison
Quick take
- •GPT-5 leads on 1 of 1 shared benchmarks, including SWE-bench Verified (74.9% vs 73.3%).
- •Claude Haiku 4.5 is meaningfully stronger at speed (98 vs 68 on our capability index).
- •GPT-5 is meaningfully stronger at math (92 vs 68).
- •Claude Haiku 4.5 has a 200K context window vs 400,000 tokens (128,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Haiku 4.5 | GPT-5 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓200K | 400,000 tokens (128,000 max output) |
| Input / 1M tokens | ✓$1.00 | $1.25 |
| Output / 1M tokens | $5.00 | $10.00 |
| Release date | 2025-10 | 2025-08 |
Benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-5 |
|---|---|---|
| SWE-bench Verified | 73.3% | ✓74.9% |
| GPQA | 64.6% | - |
| MMLU Pro | 80.0% | - |
| AIME 2025 | - | 94.6% |
| GPQA (GPT-5 pro) | - | 88.4% |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Haiku 4.5 if...
- →You need high throughput and low latency at minimal cost
- →You are fanning out many parallel sub-agents or worker calls
- →You want solid coding/computer-use quality without Opus/Sonnet pricing
- →Your task fits comfortably within a 200K context window
Choose GPT-5 if...
- →You want strong reasoning at the lowest frontier-model price
- →Existing GPT-5-based systems that are already tuned and validated
- →General coding, math, and reasoning workloads on a budget