A agentindex
Tools · LLM provider

OpenAI

The GPT and Codex model API.

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Proprietary usage
LLM provider
In these stacks
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LicenseProprietary
PricePer-token
UsageMetered
Model supportgpt
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GitHub stars—
Last activity—
Verified2026-06-27
Verified byseed

OpenAI's API platform serving the GPT model family and Codex, the de facto reference LLM API for most tooling.

Strengths

  • Widest tooling and ecosystem support
  • Consistent, well-documented API

Tradeoffs

  • Proprietary, usage-based pricing adds up
  • Vendor lock-in for GPT-only features

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