AI API Router Directory

FreeModel is a multi-model gateway that intelligently routes requests to the best-performing open models. It supports both OpenAI and Anthropic API formats and provides automatic model fallback and smart provider selection to optimize for quality.

Signup credits land instantly, no card. Community reports conflict: $10 signup credit (phone/Telegram verify) up to claims of ~$66/week (~$300 cumulative) - authenticity unconfirmed. Conservative: $10.

OpenAI Codex is the coding agent that runs across ChatGPT, an IDE extension, the CLI and cloud environments on a single ChatGPT account, with cloud worktrees, scheduled background tasks, Skills and code review. The Codex pricing documentation lists Free at $0/month for "quick coding tasks", Go at $8/month, Plus at $20/month, Pro from $100/month, Business at $20/user/month billed annually ($25 monthly, minimum 2 users) and Enterprise/Edu by contact, plus an API-key route billed at API rates. Usage is measured as messages per five-hour period that vary by model: on Plus, the documented ranges run from 250-2,000 messages for GPT-5.6 Luna down to 5-45 for GPT-6 Astra, and OpenAI states these are estimates rather than fixed limits.

Codex Free is $0/month, described as "Explore Codex capabilities on quick coding tasks"; no fixed free message count is published (Codex pricing docs, checked 2026-09-16).

Open-source local AI router (npm package '9router', MIT license, Next.js, by decolua). Connects CLI coding tools (Claude Code, Codex, Cursor, Gemini CLI, Cline, OpenCode, Antigravity, Copilot and any OpenAI/Claude-compatible client) to 40+ AI providers and 100+ models through a local OpenAI/Claude-compatible endpoint. Features: RTK token compression (20-40% savings on tool results), auto-fallback (subscription -> cheap -> free), multi-account round-robin, web dashboard. Self-hosted; users bring their own upstream accounts/keys. Implementation inspired by CLIProxyAPI.

Software is free (MIT); it routes through user-provided upstream accounts, no credits or prices from the router itself.

Open-source Go proxy server (MIT license, router-for-me/CLIProxyAPI) that wraps CLI subscriptions - Google Antigravity/Gemini, OpenAI ChatGPT Codex (GPT series), Anthropic Claude Code, xAI Grok Build, Moonshot Kimi - and exposes them as OpenAI (incl. Responses), Gemini (incl. Interactions), Claude, Codex and Grok compatible API endpoints. OAuth login flows, multi-account round-robin load balancing, streaming/non-streaming/WebSocket, function calling, multimodal input, Management API, and an embeddable Go SDK. Self-hosted; users bring their own upstream accounts/keys. Desktop wrapper: EasyCLIProxyAPI.

Software is free (MIT); access to upstream models depends on user-provided subscriptions/API keys, no credits or prices from the proxy itself.

ChatGPT's free tier is available to everyone and is described on the official pricing page as unlimited text chats with GPT-5.6 Luna subject to abuse guardrails, with limited messages when uploading files, limited and slower image generation, limited voice chats, limited deep research, limited memory and context, limited Codex access and limited ChatGPT Work access on desktop. Paid plans are priced per user per month at $8 (Go), $20 (Plus) and $200 (Pro) as announced by OpenAI on 16 January 2026, with Business and Enterprise offered monthly or annually.

No free credit or USD allowance is stated for ChatGPT on the official pricing page or the ChatGPT Go announcement (checked 2026-09-16); the free tier is a feature-limited plan, not a credit.

OpenAI Codex CLI — OpenAI's terminal coding agent (also web/IDE). Authenticates via ChatGPT OAuth or an API key. Model lineup (as of mid-2026): GPT-6 Astra, GPT-5.6 (Sol/Terra/Luna), GPT-5.5, GPT-5.4 / 5.4 mini, plus gpt-oss-120b; GPT-5.3-Codex-Spark is a Pro-only research preview. Plans: Free, Go ($8), Plus ($20), Pro 5x ($100) / 20x ($200); API-key mode is pay-as-you-go at API rates.

ChatGPT plans use credit-based usage allowances (credits per 1M tokens, e.g. GPT-5.6 Sol 100/10/500); not a fixed $ credit value. API-key mode billed at standard OpenAI API token rates.