Claude Haiku 4.5 vs GPT-5
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •Claude Haiku 4.5 is 92% cheaper on input tokens - better for high-volume workloads.
- •Claude Haiku 4.5 has a 200K context window - 2x larger than GPT-5's 128K. Better for long documents and large codebases.
Specs comparison
| Claude Haiku 4.5 | GPT-5 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓200K | 128K |
| Input / 1M tokens | ✓$0.80 | $10.00 |
| Output / 1M tokens | $4.00 | $30.00 |
| Release date | 2025-10 | 2025-06 |
Benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-5 |
|---|---|---|
| MMLU | ~82% | - |
| HumanEval | ~88% | - |
Scores sourced from official provider release posts.
Strengths
Claude Haiku 4.5
- ✓Lowest latency in the Claude lineup
- ✓Extremely cost-effective at scale
- ✓Strong at classification and extraction
- ✓Good at following structured output schemas
- ✓Handles 200K context at low cost
GPT-5
- ✓Strong general-purpose reasoning
- ✓Excellent multimodal understanding
- ✓Broad domain knowledge
- ✓Consistent instruction following
- ✓Widely supported by third-party tools
Which should you choose?
Choose Claude Haiku 4.5 if you need...
- →High-volume API pipelines
- →Real-time classification
- →Form and document extraction
- →Low-latency chatbots
Choose GPT-5 if you need...
- →General-purpose API integrations
- →Multimodal applications
- →Complex reasoning tasks
- →Enterprise deployments