🎁 Trials (no card when possible) · no card · provisional — added recently, two weeks of probes still to pass · live — last verified by a probe on 2026-09-17 · thegrid.ai · back to the whole list
OpenAI- and Anthropic-compatible inference market that sells quality tiers rather than model names — Agent Max was served by Claude Opus 5 in the 30 days to 2026-09-03 — with a $25 signup credit, for a limited time
The page this row is verified against names no free model, so the column stays empty; callable ids, where the row has them, are under Connect.
The quick start: “New accounts get a $25 signup credit (limited time), enough for millions of test calls on” text-prime, and its three steps from sign-up to a first call ask for no payment method — adding one is listed under what to do next. Concurrency counts deposits only, “a signup bonus of $25 and a deposit of $20 only counts as $20”, and an account with $0 to $20 deposited gets 3 concurrent requests. A model name buys a specification: “The specific model behind any given call can change between calls.” The keyless catalog publishes what each tier delivered over 30 days to 2026-09-03 — Agent Max Claude Opus 5, Agent Prime MiniMax-M3, Agent Standard gpt-oss-120b — at market prices per million tokens. Read 2026-09-17
https://api.thegrid.ai/v1THE_GRID_API_KEY — get one at https://app.thegrid.ai/profileANTHROPIC_BASE_URL): https://messages-beta.api.thegrid.aiagent-prime, code-prime, agent-maxNew accounts get a $25 signup credit; ids checked in https://api.thegrid.ai/v1/modelsGenerated from registry.yaml on 2026-09-18 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.