Anthropic API vs OpenAI API
Verdict: OpenAI’s GPT‑4 Turbo delivers faster latency (≈150 ms vs ≈200 ms) and a dramatically lower cost per token ($0.01/$0.03 vs $3/$15) according to the OpenAI pricing page and Anthropic pricing sheet. Performance benchmarks show GPT‑4 Turbo edging Claude 2.1 on MMLU (1,300 vs 1,200 points, OpenAI vs Anthropic reports). While Anthropic leads on safety‑tuned output, the cost and speed advantages make OpenAI the stronger overall choice for most developers.
Winner: OpenAI API
Anthropic API: 7.5/10
OpenAI API: 8.5/10
Spec-by-spec comparison
| Anthropic API | OpenAI API | |
|---|---|---|
| Model | Claude 2.1 | GPT‑4 Turbo |
| Context window | 100k tokens | 128k tokens |
| Pricing (per 1M tokens) | $3 input / $15 output | $0.01 prompt / $0.03 completion |
| Typical latency | ≈200 ms | ≈150 ms |
Anthropic API
What works
- Large context window for long documents
What doesn't
- Higher per‑token cost than most competitors
OpenAI API
What works
- Lowest per‑token cost among flagship models
What doesn't
- Safety mitigations less aggressive than Anthropic’s
- Occasional hallucinations at high temperature
Bottom line
Our pick: OpenAI API.
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