"Which one's free?" is the wrong question. The right question is "free how, for how much, and with what strings attached?" The four families developers reach for most — OpenAI's GPT, Anthropic's Claude, Meta's Llama, and Google's Gemini — answer that question very differently. Some give you a generous always-on free tier. One gives you essentially nothing on the official API. And the open one is "free" in a way that depends entirely on who's hosting it.
Here's the practical, as-of-June-2026 breakdown for a developer deciding where to send their first thousand requests.
Gemini: the most generous official free tier
Google's free tier through Google AI Studio is the one to beat. As of June 2026, the free tier offers something on the order of 1,500 requests per day on a Flash-class model, no credit card, no expiry, with per-minute limits in the low double digits (reported around 15 RPM on the Flash tier).
For a developer building a prototype, a side project, or a low-traffic tool, this is often enough to ship. You get a current, capable model, a clean API, and limits that survive real usage as long as you're not hammering it. The catch — as with most generous free tiers — is to read the data-usage terms: free-tier traffic may be used differently from paid traffic, so don't pipe sensitive data through it.
See the current limits tracked on the Google AI Studio station page.
Claude: no permanent free tier, but real credit programs
Anthropic is the opposite end of the spectrum on the official API: there's no permanent free tier in 2026. New accounts get a small credit (reported around $5, often no card required), and that's it for "just sign up and call it."
Where Claude gets genuinely free is through programs — Claude for Open Source (launched February 2026, the biggest grant of the year), the startup program, and student credits. Those are application-gated, not instant. If you want Claude for free today without qualifying for a program, you're looking at third-party relays rather than the official API. We cover all of this in free Claude API access in 2026.
Verdict for free use: weakest official free tier of the four, but the strongest grant programs if you qualify.
Llama: "free" depends entirely on the host
Llama is the wildcard because it's open-weight — there's no single "Llama free tier." What you actually compare is who hosts it for free. And here the inference providers are extraordinarily generous:
- Groq offers free access to its model lineup (including Llama-class models) with no credit card. As of June 2026 the published free limits are around 30 requests/minute, ~6,000 tokens/minute, and up to ~14,400 requests/day at the org level, with specific per-model caps (e.g. a 70B Llama model reported at 30 RPM / ~1,000 RPD / 12K TPM). Adding a card unlocks roughly 10x higher limits at no charge.
- Cerebras leads on raw daily volume — reported around 1M tokens/day on a 70B-class Llama model, no card. See the Cerebras station page.
The standout feature of these hosts isn't just the free quota — it's speed. Groq and Cerebras serve Llama models at hundreds of tokens/second, far faster than typical cloud-GPU hosting. If your app cares about latency, a free Llama tier can outperform a paid proprietary model.
Verdict for free use: the best free throughput, and the fastest, if you don't need a specific proprietary model's quality.
GPT: effectively no free API tier
OpenAI is the one to set expectations on. As of June 2026, there is no confirmed universal permanent free tier on the GPT API. Some accounts or programs may carry credits, but ordinary developers should treat GPT API usage as paid from day one unless your dashboard explicitly shows an active grant.
If you want GPT-class models without paying, the realistic routes are platforms that resell or bundle access (GitHub Models has offered free developer access to a model catalog that includes GPT-family models, within rate limits) rather than the OpenAI API itself.
Verdict for free use: assume paid. Don't architect a free project around the GPT API.
The comparison at a glance (June 2026)
| Family | Official free tier? | Best free route | Catch | |---|---|---|---| | Gemini | Yes — generous (~1,500 req/day Flash, no card) | Google AI Studio | Data-usage terms on free tier | | Claude | No permanent tier | Credit programs (OSS/startup/student) or relays | Programs are application-gated | | Llama | N/A (open-weight) | Groq / Cerebras free tiers, no card | Free quota varies by host; not a fixed model | | GPT | No (assume paid) | GitHub Models / bundled platforms | OpenAI API itself is paid |
All figures as of June 2026 and change frequently — verify before relying on them.
So what should you actually pick?
- Want the most calls for $0 with the least friction? Gemini's free tier. Sign up, no card, ship a prototype.
- Latency-sensitive, fine with an open model? A free Llama host like Groq or Cerebras — the speed is the differentiator.
- Need Claude specifically and qualify for a program? Apply; the grants are large.
- Need GPT specifically? Budget for it. There's no free lunch on the official API.
For the live, categorized list of every provider's current free access — official sites, public-interest relays, and aggregators — browse the FreeAIRouter directory, and for the full free-tier rundown see which LLMs have a free tier in 2026.