← Back to all comparisons
Side-by-side
Claude Haiku 4.5 vs GPT-5 mini
Anthropic vs OpenAI — head-to-head specs and pricing.
Anthropic
Claude Haiku 4.5
Fast and cheap from Anthropic.
Haiku is Anthropic's small model — optimized for throughput and cost.
OpenAI
GPT-5 mini
Fast, cheap, still smart.
GPT-5 mini is a smaller variant of GPT-5 optimized for throughput and cost. Great default for chat and classification.
| Spec | Claude Haiku 4.5 | GPT-5 mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input cost / 1M tokens | $0.96 | $0.18 |
| Output cost / 1M tokens | $4.80 | $0.72 |
| Context window | 200,000 tokens | 128,000 tokens |
| Max output tokens | 8,000 | 8,000 |
| Streaming support | ✓ | ✓ |
| Tool calling | ✓ | ✓ |
| Vision input | — | ✓ |
| JSON mode | — | ✓ |
| Status | ACTIVE | ACTIVE |
Use both via OneAPIKey — one key, one bill
OneAPIKey aggregates Anthropic, OpenAI, and 10 more providers behind a single API. Smart Routing automatically picks the best model per request — or you choose explicitly.