# Gemini Developer API vs OpenAI API (slim)

> OpenAI API has a score of 82.8 (A) against Gemini Developer API's 62 (B). Both do llm inference. The largest gap is security & auth, 40 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gemini-api-vs-openai-api.md (~1,450 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/compare/gemini-api-vs-openai-api.json · canonical https://www.anchorterminal.com/compare/gemini-api-vs-openai-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

OpenAI API has a score of 82.8 (A) against Gemini Developer API's 62 (B). Both do llm inference. The largest gap is security & auth, 40 points.

- Gemini Developer API: B 62, rank #223 of 452 · https://www.anchorterminal.com/tools/gemini-api.min.md
- OpenAI API: A 82.8, rank #2 of 452 · https://www.anchorterminal.com/tools/openai-api.min.md
- Pick Gemini Developer API for payments & pricing (+10). Pick OpenAI API for reliability (+30), schema & documentation (+35), agent ergonomics (+13), security & auth (+40), maintenance & community (+8), transparency & trust (+7).

| Category | Gemini Developer API | OpenAI API |
| --- | --- | --- |
| Reliability (16%) | 40 | 70 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 65 | 100 |
| Agent ergonomics (13%) | 85 | 98 |
| Security & auth (14%) | 60 | 100 |
| Payments & pricing (10%) | 40 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 91 |
| Transparency & trust (7%) | 78 | 85 |