One key · 338 models · 52 labs
The transparent interface for LLMs.
One OpenAI-compatible endpoint for every major model. You pay the model's price plus a flat 3% — and the math is printed next to every price on this site.
curl https://api.openkey.ai/v1/chat/completions -H "Authorization: Bearer $OPENKEY_API_KEY" -d '{"model": "anthropic/claude-sonnet-4.5", "messages": [{"role": "user", "content": "Hello"}]}'Per 1M input tokens
anthropic/claude-sonnet-4.5
$3.00 + 3% $0.090$3.09
openai/gpt-5.2
$1.75 + 3% $0.052$1.80
deepseek/deepseek-v3.2
$0.229 + 3% $0.0069$0.236
FEE — FLAT, EVERY MODEL3%
HIDDEN CHARGES$0.00
- 338
- Models
- 52
- Labs
- 25
- Free models
- 3%
- Flat fee
The fee
It's arithmetic, not a pricing page.
- One rule for every model
- Every model costs its provider price plus 3%. No tiers, no negotiated rates, no exceptions.
- No credit games
- No purchase fee when you top up, no expiring balances, no spread hidden in the token price.
- The math is printed
- Every price on this site shows the provider price beside it. Check our arithmetic anywhere.
Worked example
anthropic/claude-sonnet-4.5
Input · 1M tokens
$3.00 + 3%$3.09
Output · 1M tokens
$15.00 + 3%$15.45
Provider price sourced live. The 3% is our entire margin.
Catalog
Just added
AnthropicNewClaude Sonnet 5
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
ctx 1Min $2.06out $10.30
GoogleNewNano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is Google's fastest, most cost-efficient Gemini image model, built for high-velocity developer pipelines and rapid-fire visual exploration. It delivers text-to-image generation...
ctx 66Kin $0.258out $1.54
Sakana AINewFugu Ultra
Fugu Ultra is the higher-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to route...
ctx 1Min $5.15out $30.90
GoogleNewNano Banana Pro (Gemini 3 Pro Image)
Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...
ctx 66Kin $2.06out $12.36
GoogleNewNano Banana 2 (Gemini 3.1 Flash Image)
Gemini 3.1 Flash Image, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines advanced...
ctx 131Kin $0.515out $3.09
CohereFreeNorth Mini Code (free)
North Mini Code is Cohere's first agentic coding model and the debut of its North family. A sparse mixture-of-experts model with 30B total parameters and 3B active, it is optimized...
ctx 256Kin Freeout Free
Workhorses
AnthropicClaude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
ctx 200Kin $5.15out $25.75
OpenAIGPT-5.2
GPT-5.2 is the latest frontier-grade model in the GPT-5 series, offering stronger agentic and long context perfomance compared to GPT-5.1. It uses adaptive reasoning to allocate computation dynamically, responding quickly...
ctx 400Kin $1.80out $14.42
DeepSeekDeepSeek V3.2
DeepSeek-V3.2 is a large language model designed to harmonize high computational efficiency with strong reasoning and agentic tool-use performance. It introduces DeepSeek Sparse Attention (DSA), a fine-grained sparse attention mechanism...
ctx 131Kin $0.236out $0.353
QwenQwen3 Max
Qwen3-Max is an updated release built on the Qwen3 series, offering major improvements in reasoning, instruction following, multilingual support, and long-tail knowledge coverage compared to the January 2025 version. It...
ctx 262Kin $0.803out $4.02
Moonshot AIKimi K2.5
Kimi K2.5 is Moonshot AI's native multimodal model, delivering state-of-the-art visual coding capability and a self-directed agent swarm paradigm. Built on Kimi K2 with continued pretraining over approximately 15T mixed...
ctx 262Kin $0.386out $2.09
Z.aiGLM 5.2
GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level software engineering,...
ctx 1.0Min $0.958out $3.09
338 models. One key. One rule.
Point your OpenAI SDK at api.openkey.ai and switch models by changing one string.