Yes. As of 2026-10-09, 4 free LLM eval and observability offers we track are available, each dated when last verified against the provider's page.
| Offer | Provider | Status | What it offers | Expiry | Verified | Source | Caveats |
|---|---|---|---|---|---|---|---|
| Braintrust Starter plan | Braintrust | available | $10 model credits/month, 1 GB processed data/month, 10K scores/month, 14-day data retention, unlimited users, projects, datasets, playgrounds and experiments; no credit card | no stated expiry | 2026-09-16 | source | 14-day retention. Re-read first-party 2026-09-16 and holds. ADDED: the Starter plan carries 14-day data retention, which this row did not state — an evaluation history older than a fortnight is gone, which matters m… |
| Inference.net Pay as you go plan | Inference.net | available | Pay as you go plan at "$0+ usage", including "1M included Gateway requests" and "1M / mo Tracing spans", 14-day data retention, 1 seat, 30 req/min. | no stated expiry | 2026-10-08 | source | The allowance is for the gateway and tracing: the page states usage is billed ("$0+ usage") and does not say model inference itself is free. The Growth plan adds a "$50 one-time opening credit" at $250 per month. |
| Langfuse Cloud Hobby plan | Langfuse | available | 50,000 units/month, 30-day data access, 2 users, all platform features with limits | no stated expiry | 2026-09-16 | source | OSS self-host is unlimited and free as an alternative |
| LangSmith Developer plan | LangChain | available | 5,000 base traces/month (14-day retention), 1 seat, core tracing + evals | no stated expiry | 2026-09-16 | source | single seat; pay-as-you-go beyond 5K traces |
Free LLM APIs, no card · Free AI APIs an agent can sign up for · Machine-readable: ai-deals.json