AI API
A free AI API and LLM gateway for GPT-5.4, Claude, Gemini, DeepSeek, Llama, and Qwen. One API key — and one Claude API key — through a single OpenAI-compatible endpoint. $5 free credit, pay-per-token pricing, no subscriptions.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Why use a unified AI API?
One API key, 60+ AI models
YepAPI is an AI models API for text, image, and video generation. Access GPT-5.4, Claude, Gemini, DeepSeek, Llama, Qwen — all through one LLM API key. No juggling providers.
OpenAI compatible API endpoint
Our OpenAI compatible API endpoint means zero code changes. Same request format, same response shape. Drop in YepAPI's base URL and switch models by changing one parameter.
AI gateway & LLM router
YepAPI works as an AI gateway, routing requests to 60+ models through a single endpoint. An LLM API router that handles authentication, rate limits, and failover across all providers.
Cheapest AI API pricing
Straightforward pay-per-token pricing for production workloads — no subscriptions and no monthly minimums. Access GPT-4o, DeepSeek, and Claude API pricing through one key, billed per token.
One API call. Any model.
OpenAI-compatible endpoint — same format you already use.
const res = await fetch("https://api.yepapi.com/v1/ai/chat/completions", {
method: "POST",
headers: {
"Authorization": "Bearer yep_sk_your_key",
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "deepseek/deepseek-chat-v3-0324",
messages: [{ role: "user", content: "Explain quantum computing" }],
}),
});
const data = await res.json();
console.log(data.choices[0].message.content);from openai import OpenAI
client = OpenAI(
base_url="https://api.yepapi.com/v1/ai",
api_key="yep_sk_your_key",
)
response = client.chat.completions.create(
model="deepseek/deepseek-chat-v3-0324",
messages=[{"role": "user", "content": "Explain quantum computing"}],
)
print(response.choices[0].message.content)Switch models by changing one parameter. Works with the OpenAI SDK, LangChain, Vercel AI SDK, or raw HTTP.
Text Generation
GPT-4o Mini
OpenAIAccess GPT-4o Mini through one API key. Fast, cheap, and OpenAI-compatible.
GPT-4o
OpenAIAccess GPT-4o through one API key. Flagship reasoning and multimodal capabilities.
Claude Sonnet 4
AnthropicAccess Claude Sonnet 4 through one API key. Anthropic's best balance of speed and intelligence.
Claude Haiku 4
AnthropicAccess Claude Haiku 4 through one API key. Anthropic's fastest model for high-volume tasks.
Gemini 2.5 Flash
GoogleAccess Gemini 2.5 Flash through one API key. Google's fastest model with 1M context.
Gemini 2.5 Pro
GoogleAccess Gemini 2.5 Pro through one API key. Google's most capable model with 1M context.
Llama 4 Scout
MetaAccess Llama 4 Scout through one API key. Meta's open-weight model with 512K context.
DeepSeek V3
DeepSeekAccess DeepSeek V3 through one API key. Frontier-level coding at a fraction of the cost.
DeepSeek R1
DeepSeekAccess DeepSeek R1 through one API key. Reasoning-specialized model for complex problems.
GPT-5.5
OpenAIAccess GPT-5.5 through one API key. OpenAI's newest and most capable model.
GPT-5.5 Pro
OpenAIAccess GPT-5.5 Pro through one API key. OpenAI's most powerful reasoning model.
GPT-5.4
OpenAIAccess GPT-5.4 through one API key. OpenAI's latest and most capable model.
GPT-5.4 Mini
OpenAIAccess GPT-5.4 Mini through one API key. Smart and affordable with 400K context.
GPT-5.4 Nano
OpenAIAccess GPT-5.4 Nano through one API key. Ultra-cheap for high-volume tasks.
Claude Opus 4.8
AnthropicAccess Claude Opus 4.8 through one API key. Anthropic's newest and most intelligent model.
Claude Opus 4.8 Fast
AnthropicAccess Claude Opus 4.8 Fast through one API key. Flagship intelligence with low-latency output.
Claude Fable 5
AnthropicAccess Claude Fable 5 through one API key. Anthropic's creative writing flagship.
Claude Opus 4.7
AnthropicAccess Claude Opus 4.7 through one API key. Anthropic's newest and most intelligent model.
Claude Opus 4.6
AnthropicAccess Claude Opus 4.6 through one API key. Anthropic's previous-generation flagship.
Claude Sonnet 4.6
AnthropicAccess Claude Sonnet 4.6 through one API key. Anthropic's latest balanced model with 1M context.
Grok 4.3
xAIAccess Grok 4.3 through one API key. xAI's latest model with 1M context.
Grok 4.20
xAIAccess Grok 4.20 through one API key. xAI's flagship model with the largest context window.
Gemini 3.5 Flash
GoogleAccess Gemini 3.5 Flash through one API key. Google's latest fast multimodal model.
Gemini 3.1 Pro
GoogleAccess Gemini 3.1 Pro through one API key. Google's next-generation model.
Qwen3.7 Max
QwenAccess Qwen3.7 Max through one API key. Alibaba's most capable Qwen model.
Qwen 3.6 Plus
QwenAccess Qwen 3.6 Plus through one API key. Powerful reasoning with 1M context at a great price.
Mistral Medium 3.5
MistralAccess Mistral Medium 3.5 through one API key. Mistral's balanced mid-tier model.
Mistral Small 4
MistralAccess Mistral Small 4 through one API key. Europe's leading AI model at a great price.
Devstral 2
MistralAccess Devstral 2 through one API key. Mistral's coding-specialized model for developers.
GPT-5.4 Pro
OpenAIAccess GPT-5.4 Pro through one API key. OpenAI's most powerful reasoning model.
Sonar Pro
PerplexityAccess Sonar Pro through one API key. Search-augmented AI with citations built in.
Sonar
PerplexityAccess Sonar through one API key. Affordable search-augmented AI with citations.
Qwen 3 Coder
QwenAccess Qwen 3 Coder through one API key. Coding-specialized model at an ultra-low price.
Mistral Small Creative
MistralAccess Mistral Small Creative through one API key. Creative writing at the lowest price.
Gemini 3 Flash
GoogleAccess Gemini 3 Flash through one API key. Google's next-generation fast model.
Grok 4.20 Multi-Agent
xAIAccess Grok 4.20 Multi-Agent through one API key. Multi-agent orchestration with 2M context.
GPT-5.3 Chat
OpenAIAccess GPT-5.3 Chat through one API key. Reliable previous-generation OpenAI model.
GPT-5.3 Codex
OpenAIAccess GPT-5.3 Codex through one API key. Previous-gen coding model with massive output.
GPT-5.2 Pro
OpenAIAccess GPT-5.2 Pro through one API key. Previous-gen premium reasoning model.
GPT-5.2
OpenAIAccess GPT-5.2 through one API key. Previous-generation flagship model.
GPT-5.2 Chat
OpenAIAccess GPT-5.2 Chat through one API key. Reliable chat model.
GPT-5.2 Codex
OpenAIAccess GPT-5.2 Codex through one API key. Reliable coding model with massive context.
GPT-5.1 Codex Max
OpenAIAccess GPT-5.1 Codex Max through one API key. Max-output coding model.
GPT Audio
OpenAIAccess GPT Audio through one API key. Audio-capable multimodal model.
GPT Audio Mini
OpenAIAccess GPT Audio Mini through one API key. Affordable audio-capable model.
Claude Opus 4.6 Fast
AnthropicAccess Claude Opus 4.6 Fast through one API key. Fastest Opus with 128K output.
Gemini 3.1 Flash Lite
GoogleAccess Gemini 3.1 Flash Lite through one API key. Ultra-affordable with 1M context.
Gemma 4 31B
GoogleAccess Gemma 4 31B through one API key. Google's open-weight model at ultra-low cost.
Gemma 4 26B
GoogleAccess Gemma 4 26B through one API key. Efficient MoE model at the lowest price.
Qwen 3.5 Plus
QwenAccess Qwen 3.5 Plus through one API key. Strong model with 1M context.
Qwen 3.5 397B
QwenAccess Qwen 3.5 397B through one API key. Alibaba's largest MoE model.
Qwen 3.5 122B
QwenAccess Qwen 3.5 122B through one API key. Efficient MoE model.
Qwen 3.5 35B
QwenAccess Qwen 3.5 35B through one API key. Ultra-fast MoE model.
Qwen 3.5 27B
QwenAccess Qwen 3.5 27B through one API key. Dense model for consistent performance.
Qwen 3.5 9B
QwenAccess Qwen 3.5 9B through one API key. Cheapest model for high-volume tasks.
Qwen 3.5 Flash
QwenAccess Qwen 3.5 Flash through one API key. Ultra-fast with 1M context.
Qwen 3 Max Thinking
QwenAccess Qwen 3 Max Thinking through one API key. Reasoning model for complex problems.
Llama 4 Maverick
MetaAccess Llama 4 Maverick through one API key. Meta's most capable open-weight model.
MiniMax M3
MiniMaxAccess MiniMax M3 through one API key. MiniMax's latest flagship with 1M context.
MiniMax M2.7
MiniMaxAccess MiniMax M2.7 through one API key. Bilingual flagship model with massive output.
MiniMax M2.5
MiniMaxAccess MiniMax M2.5 through one API key. Affordable bilingual model.
GLM 5.2
Z.aiAccess GLM 5.2 through one API key. Z.ai's latest flagship with 1M context.
GLM 5.1
Z.aiAccess GLM 5.1 through one API key. Zhipu AI's latest bilingual model.
GLM 5
Z.aiAccess GLM 5 through one API key. Balanced bilingual model from Zhipu AI.
GLM 5 Turbo
Z.aiAccess GLM 5 Turbo through one API key. Fast bilingual model from Zhipu AI.
Seed 2.0 Lite
ByteDanceAccess Seed 2.0 Lite through one API key. ByteDance's latest bilingual model.
Seed 2.0 Mini
ByteDanceAccess Seed 2.0 Mini through one API key. Ultra-cheap from ByteDance.
Seed 1.6
ByteDanceAccess Seed 1.6 through one API key. Reliable model from ByteDance.
Seed 1.6 Flash
ByteDanceAccess Seed 1.6 Flash through one API key. Cheapest model from ByteDance.
MiMo V2 Pro
XiaomiAccess MiMo V2 Pro through one API key. Xiaomi's flagship AI model.
MiMo V2 Omni
XiaomiAccess MiMo V2 Omni through one API key. Xiaomi's multimodal model.
MiMo V2 Flash
XiaomiAccess MiMo V2 Flash through one API key. Cheapest Xiaomi model.
DeepSeek V3.2
DeepSeekAccess DeepSeek V3.2 through one API key. Latest DeepSeek model.
Claude Sonnet 4.5
AnthropicAccess Claude Sonnet 4.5 through one API key. Previous-gen Anthropic flagship.
Grok 4.1 Fast
xAIAccess Grok 4.1 Fast through one API key. Fast xAI model with 2M context.
Gemini 2.5 Flash Lite
GoogleAccess Gemini 2.5 Flash Lite through one API key. Google's cheapest model.
GPT-OSS 120B
OpenAIAccess GPT-OSS 120B through one API key. OpenAI's open-source model.
Step 3.5 Flash
StepFunAccess Step 3.5 Flash through one API key. StepFun's fast model.
Kimi K2.7 Code
Moonshot AIAccess Kimi K2.7 Code through one API key. Moonshot AI's coding-specialized model.
Kimi K2.5
Moonshot AIAccess Kimi K2.5 through one API key. Moonshot AI's flagship model.
Nemotron 3 Super
NVIDIAAccess Nemotron 3 Super through one API key. NVIDIA's free model.
DeepSeek V4 Flash
DeepSeekAccess DeepSeek V4 Flash through one API key. 1M context, MoE speed, budget pricing.
DeepSeek V4 Pro
DeepSeekAccess DeepSeek V4 Pro through one API key. Frontier reasoning at a fraction of flagship pricing.
Image Generation
Nano Banana 3.1 Flash
GoogleFast AI image generation via Nano Banana 3.1 Flash. Generate and edit images up to 4K resolution.
Nano Banana 3 Pro
GoogleNano Banana API for AI image generation. Generate photorealistic images from text prompts — an AI image generator API and Midjourney alternative via simple REST API.
Video Generation
Veo 3.1
GoogleAI video generation via Veo 3.1. Generate videos from text or images at up to 4K resolution.
Veo 3.1 Fast
GoogleAI video generation API powered by Google Veo 3.1. Generate videos from text prompts at up to 4K — a Sora, Runway, and Kling alternative via simple REST API.
Veo 3.1 Lite
GoogleBudget AI video generation via Veo 3.1 Lite. Fastest and cheapest option.
Seedance 2.0
ByteDanceAI video generation API powered by ByteDance's Seedance 2.0. Generate videos from text, images, or video references with built-in audio generation.
Seedance 2.0 Fast
ByteDanceFast AI video generation powered by ByteDance's Seedance 2.0. Lower cost, faster output with same flexibility.
Sora 2
OpenAIAI video generation API powered by OpenAI's Sora 2. Generate videos with synced audio from text or images.
Sora 2 Pro
OpenAIPremium AI video generation powered by OpenAI's Sora 2 Pro. Production-quality videos up to 1080p with synced audio.
Music Generation
The LLM API that gives you 60+ models through one endpoint
YepAPI's LLM API is a unified AI gateway and AI models API that gives you access to 60+ AI models through a single OpenAI compatible API endpoint. Use the GPT-4o API, DeepSeek API, Claude API, Gemini API, Llama API, and Qwen API — all through one LLM API endpoint. Send the same request format you use with OpenAI and switch models by changing one parameter.
Looking for a free AI API to start with? Get $5 free credit on signup — no credit card — then pay as you go, per token, with no subscriptions. The DeepSeek API starts at $0.20/M input tokens. The GPT-4o API costs $3.50/M input. Claude API pricing starts at $1.12/M for Haiku. No monthly minimums makes this the LLM API developers reach for when they want pay-as-you-go pricing with broad model coverage.
YepAPI works as an AI gateway and LLM router — one key, one bill, one dashboard. Building an AI agent, chatbot, or content tool? This LLM API works with any framework — LangChain, LlamaIndex, Vercel AI SDK, or raw HTTP calls. Plus, your same API key covers web scraping, SEO data, SERP results, and YouTube APIs. Compare OpenRouter pricing to YepAPI — same models, better value.
OpenRouter alternative — better pricing, more APIs
Compare OpenRouter pricing to YepAPI: same LLM API access, but YepAPI bundles web scraping, SEO, SERP, and YouTube APIs under one key. The cheapest AI API with no monthly minimums.
AI API — Frequently asked questions
An AI API gives you programmatic access to large language models (LLMs) like GPT-5.4, Claude, Gemini, and DeepSeek. You send a prompt via HTTP request and get back generated text, code, or structured data. YepAPI's AI API is a unified endpoint — one API key accesses 60+ models from OpenAI, Anthropic, Google, Meta, and more.
YepAPI gives you $5 free credit on signup — no credit card required. That's enough for thousands of API calls on cheaper models like DeepSeek, Llama, or Qwen. There's no free tier with hard limits — you get real credits to use on any model, then pay as you go.
Sign up for YepAPI and your single API key works as your Claude API key — the same key also accesses GPT-5.4, Gemini, DeepSeek, and 60+ other models. No Anthropic enterprise contract or separate Claude API key required. You get $5 free credit on signup (no credit card), then pay per token: Claude Haiku 4.5 from $1.12/M input, Claude Sonnet 4.6 at $4.20/M input. Use it with the OpenAI SDK by changing the base URL — your Claude API key works through the same OpenAI-compatible endpoint.
OpenAI API pricing through YepAPI is simple per-token billing. GPT-4o costs $3.50/M input and $14/M output; GPT-4o mini costs $0.21/M input and $0.84/M output; GPT-5.4 and GPT-5.5 are available per token. There are no monthly minimums or subscriptions — your $5 free credit covers thousands of OpenAI API calls, then you pay per token. The same key also accesses Claude, Gemini, and DeepSeek through one OpenAI-compatible endpoint.
An LLM gateway is a unified API layer that sits between your app and multiple AI model providers. Instead of integrating with OpenAI, Anthropic, Google, and Meta separately, you connect to one gateway. YepAPI acts as an LLM gateway and router — one endpoint, one key, one billing dashboard. Switch between models by changing a single parameter.
Through YepAPI, DeepSeek V3.2 costs $0.36/M input tokens and $0.53/M output tokens. DeepSeek R1 (reasoning model) costs $0.77/M input and $3.07/M output. No monthly minimums — pay per token, starting from your $5 free credit.
An OpenAI-compatible API uses the same request and response format as OpenAI's API. Any code written for the OpenAI SDK works with YepAPI — just change the base URL and API key. This means you can access Claude, Gemini, DeepSeek, and Llama models using the same OpenAI client libraries you already use.
YepAPI serves a similar role to OpenRouter — both are LLM gateways that give you access to multiple AI models through one API. The differences: YepAPI bundles web scraping, SEO, SERP, and YouTube APIs under the same key, uses straightforward pay-per-token pricing, and gives you $5 free credit to start. If you want an OpenRouter alternative with broader API coverage, YepAPI is it.
Claude API pricing through YepAPI is per-token. Claude Sonnet 4.6 costs $4.20/M input and $21/M output. Claude Haiku 4.5 costs $1.12/M input and $5.60/M output. Claude Opus 4.8 costs $7/M input and $35/M output. No monthly minimums — pay only for the tokens you use. Access the Claude API without an Anthropic enterprise contract.
The GPT-4o API through YepAPI costs $3.50/M input tokens and $14/M output tokens. GPT-4o mini costs $0.21/M input and $0.84/M output. No monthly subscriptions or minimums. Your $5 free credit covers thousands of GPT-4o API calls. Switch between GPT-4o and any other model by changing one parameter.
YepAPI is an affordable LLM API for accessing multiple AI models. DeepSeek models start at $0.20/M tokens. Llama models start at $0.21/M tokens. Qwen models start at $0.07/M tokens. No monthly minimums, and $5 free credit on signup. Compare that to juggling OpenRouter or going direct to each provider — YepAPI gives you the broadest model coverage under one key.
OpenRouter pricing and YepAPI pricing are both per-token with no monthly minimums. The key differences: YepAPI bundles web scraping, SEO, SERP, and YouTube APIs under the same key — OpenRouter is LLM-only. YepAPI gives you $5 free credit on signup. Both offer the same models (GPT-4o API, DeepSeek API, Claude API, Gemini), but YepAPI is a more complete AI gateway for developers building data-driven apps.
DeepSeek API pricing through YepAPI: DeepSeek V3.2 costs $0.14/M input and $0.28/M output tokens. DeepSeek R1 (reasoning model) costs $0.55/M input and $2.19/M output. The DeepSeek API is one of the cheapest LLM APIs available — $5 free credit covers tens of thousands of calls. No monthly minimums, no subscriptions.
Ready to build with AI?
All 96 models included with one API key. $5 free credit on signup. No credit card required.