100% Free Developer Tiers · Verified for 2026
Best Free AI APIs for Developers
Stop paying upfront for experimentation. Here are the top foundational AI and LLM APIs offering generous permanent free tiers with zero credit cards required.
Largest Free Allowance
Google Gemini 1.5 Flash
1,500 requests per day + 1M token context window completely free.
Fastest Streaming Speed
Groq Cloud (LPU)
300+ tokens/sec on Llama 3.3 70B with instantaneous response times.
Flagship Playground Access
GitHub Models
Free developer testing for GPT-4o, Claude 3.5 Sonnet, and Mistral.
Verified Free AI API Directory
6 Free Endpoints Available#1
Gemini 1.5 Flash (Google AI Studio)
GoogleNo Credit Card RequiredThe most generous permanent free tier in the AI industry.
Free Allowance:
15 Requests / Min (1,500 Requests / Day Free)
Limits: 15 RPM / 1M TPM / 1500 RPD
What Makes It Great
- •Massive 1M token context completely free
- •No credit card required to get an API key
- •Native multimodal vision, audio, and video support
Free Tier Restrictions
- •Prompt data may be reviewed by human trainers on the free tier
Recommended for: High-volume production prototyping, massive document ingestion, audio/video analysis
#2
Groq Cloud (Llama 3.3 70B & Mixtral)
GroqNo Credit Card RequiredThe fastest free hosted inferencing in the world.
Free Allowance:
Free Developer Tier on LPUs
Limits: 30 RPM / 6,000 TPM
What Makes It Great
- •Mind-bending 300+ tokens per second streaming speed
- •OpenAI SDK compatible drop-in replacement
- •Host to state-of-the-art open weights (Llama 3.3 70B, Whisper v3)
Free Tier Restrictions
- •Strict TPM (Tokens Per Minute) caps on 70B models during peak hours
Recommended for: Real-time conversational agents, instant voice bot backends, speed-critical tasks
#3
Cloudflare Workers AI
CloudflareNo Credit Card RequiredZero-config serverless edge AI deployment.
Free Allowance:
10,000 Neurons / Day Free (~100-300 requests/day)
Limits: Daily neuron quota based
What Makes It Great
- •Runs at Cloudflare edge datacenters worldwide (<30ms latency)
- •Supports text, image generation (Flux/SD), and Whisper speech
- •Integrated into standard Cloudflare Workers
Free Tier Restrictions
- •Neuron quota can be depleted quickly on large 70B models
Recommended for: Edge functions, microservices, serverless web scrapers
#4
GitHub Models (Marketplace)
GitHub / MicrosoftNo Credit Card RequiredPlay with flagship OpenAI and Anthropic models for free.
Free Allowance:
Free developer experimentation rate limits
Limits: 15 RPM / 150 RPD
What Makes It Great
- •Free playground access to GPT-4o, Claude 3.5 Sonnet, and Mistral Large
- •Seamless integration with GitHub personal access tokens (PAT)
- •No credit card or cloud billing setup needed
Free Tier Restrictions
- •Meant for development & prototyping, not high-volume production scale
Recommended for: Testing GPT-4o, Claude 3.5 Sonnet, and Llama 3 directly in VS Code / Codespaces
#5
Cohere Command R / Embed
CohereNo Credit Card RequiredThe gold standard for search reranking and RAG retrieval.
Free Allowance:
Trial key with 1,000 calls / month free
Limits: 100 RPM trial tier
What Makes It Great
- •Industry-standard Rerank API (Rerank 3.5)
- •High-precision citations and RAG grounding
- •Free trial tier with no credit card requirement
Free Tier Restrictions
- •Free trial tier cannot be used for commercial production traffic
Recommended for: Enterprise RAG pipelines, text embeddings, and multilingual search reranking
#6
Mistral La Plateforme (Experimentation)
Mistral AINo Credit Card RequiredTop-tier code autocompletion and European privacy.
Free Allowance:
Free API access to Mistral Small & Codestral
Limits: 1 RPS / Tier limits
What Makes It Great
- •Exceptional performance for fill-in-the-middle code completion
- •Strict GDPR privacy standards
- •No upfront payment needed
Free Tier Restrictions
- •Rate limited to 1 request per second on free tiers
Recommended for: Fast European code completion (Codestral) and lightweight reasoning