10 Best Free LLM APIs in 2026
After testing 50+ providers, these are the 10 best free LLM APIs you can use in production today.
Finding a free LLM API that actually works in production is harder than it should be. Most "free" tiers are crippled with rate limits, require a credit card upfront, or vanish after a few months.
We tested 50+ providers over 90 days. Here are the 10 that survived.
1. Groq — Best overall for speed
Free tier: 14,400 requests/day, 30 requests/minute, no credit card.
Groq's LPU is genuinely the fastest inference you can get for open-source models. We measured 500+ tokens/second on Llama 3.3 70B. The OpenAI-compatible API means migrating takes minutes.
Best for: Real-time chatbots, code generation, anything latency-sensitive.
2. OpenRouter — Best for model variety
Free tier: 20 free requests/day across rotating free models, no card.
OpenRouter gives you access to 100+ models through one API. The free tier rotates models daily, so you'll always have fresh options. Several flagship models are free at any time.
Best for: Building model-agnostic apps, A/B testing different LLMs.
3. DeepSeek — Best for cost-sensitive production
Free tier: 5M tokens free, then $0.14/M input tokens.
DeepSeek-V3 and R1 match GPT-4 on most benchmarks. The pricing after the free tier is the lowest in the industry. Open weights available for self-hosting.
Best for: High-volume apps where OpenAI pricing is prohibitive.
4. Mistral AI — Best European option
Free tier: 1 req/sec, 500k tokens/month, no card.
Mistral is GDPR-compliant with EU data residency. Strong code-specialized models (Codestral) and the La Plateforme is a joy to use.
Best for: EU companies, code generation, multilingual apps.
5. HuggingFace Inference — Best model variety
Free tier: $0.10/month serverless credit, no card.
100,000+ community models through one API. Includes embeddings, vision, audio. Cold starts can be slow on free tier.
Best for: Niche models, RAG, multi-modal pipelines.
How we picked these
We scored each provider on the APIVault Trust Score: reliability (35%), free tier generosity (30%), documentation (20%), popularity (15%).
Honorable mentions
- Fireworks AI — Blazing fast TTFT, $1 free credit
- Together — $5 free credit, fine-tuning support
- Cohere — Best RAG tooling, but smaller free tier
- Replicate — Massive model community, but cold starts
- Lemonfox — Cheapest per-token, tiny free credit