Live-probed against real free-tier keys on 2026-04-25. Adds 8 models
that returned 200 with content, drops the one OR :free route that
404s, and corrects two Google rate-limits whose catalog values were
~10x-50x too high.

Adds:
- Cloudflare: @cf/moonshotai/kimi-k2.5, @cf/qwen/qwen3-30b-a3b-fp8,
  @cf/deepseek-ai/deepseek-r1-distill-qwen-32b
- Google preview: gemini-3-flash-preview, gemini-3.1-flash-lite-preview,
  gemini-3.1-pro-preview (Pro confirmed free-tier-eligible by the
  free_tier_requests quota metric in 429 errors)
- OpenRouter: google/gemma-4-31b-it:free, liquid/lfm-2.5-1.2b-instruct:free

Removes:
- openrouter/arcee-ai/trinity-large-preview:free (404 No endpoints found)

Corrects:
- gemini-2.5-flash and gemini-2.5-flash-lite RPD 250/1000 -> 20.
  Free tier now uniformly enforces 20 RPD per model per project.

Updates router test rationale: gemini-3.1-pro-preview at rank 1 now
outranks Groq's gpt-oss-120b (rank 6) when keys exist for both.

Google moved Pro-tier Gemini off the free tier on 2026-04-01. Cerebras
added z.ai GLM-4.7 (355B) to their free tier, throttled to 10 RPM /
100 RPD with an 8192 context cap while demand stays high.

Adds a worked Python example showing the round-trip (assistant tool_calls →
tool role follow-up → final answer), notes streaming support, and clarifies
the pass-through vs. Gemini-translation split.

Cloudflare's OpenAI-compat endpoint rejects assistant messages with
content: null, even when tool_calls are present (standard OpenAI format).
Added normalizeMessages() that converts null content to "" before dispatch,
plus a regression test covering the null-content + tool_calls case.

Also credits @moaaz12-web in README Contributors for the tool-calling PR.

The stack grew wider; the headline had to bow.

Kimi, Gemma, M1, HF depart the stage,
DeepSeek, Maverick, Ling, and GPT-OSS engage.
Twenty-two new rows, four fade from view —
Agentic rank reshapes what falls through.

Self-hosted OpenAI-compatible proxy that aggregates the free tiers of
fourteen LLM providers — Google, Groq, Cerebras, SambaNova, NVIDIA,
Mistral, OpenRouter, GitHub Models, Hugging Face, Cohere, Cloudflare,
Zhipu, Moonshot, MiniMax — behind a single /v1/chat/completions endpoint.

Server:
- Express + SQLite, per-provider adapters with streaming and non-streaming
  support, automatic fallover on 429/5xx, per-key RPM/RPD/TPM/TPD tracking,
  sticky sessions for multi-turn, AES-256-GCM encrypted key storage,
  unified bearer-token auth, periodic health checks.

Client:
- React + Vite + shadcn/ui admin dashboard: keys, fallback chain (drag
  to reorder, color-coded per-provider monthly token budget), playground,
  analytics with per-provider breakdowns.

Tooling:
- GitHub Actions CI (server tests + client build), MIT license,
  README with provider-by-provider ToS review.

For personal experimentation, not production.