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GPT-5 · OpenAI-compatible · one key, all models

The same GPT-5, 30–50% cheaper

Same OpenAI upstream, same quality — flatkey costs half. Change one line of base_url and your existing OpenAI SDK just works. Try it below, sign in when you are ready.

OpenAI official
$10.00
/ million output tokens
flatkey · same model, same quality
$5.50
/ million output tokens
↓ Save 50% — double your token budget
Playground (edit before sign-up)
model: gpt-5temp 0.7 · 1024 tok
temperature 0.7max_tokens 1024top_p 1.0
▶ Sign in to runGoogle / GitHub one-click · no credit card to start
Est. this run ≈ $0.003 (flatkey · official ≈ $0.006)
Pricing vs official
GPT-5 output$5.5 $10
GPT-5 mini output$1.1 $2
GPT-5 input$0.7 $1.25
Cache reads50% off
CoverageGPT · Gemini · Claude · DeepSeek · Seedance

* Illustrative pricing — see flatkey pricing page

migrate.py — change one line
# Your existing OpenAI code:
client = OpenAI(
  base_url="https://router.flatkey.ai/v1"
  api_key="sk-flatkey-...",
)
client.chat.completions.create(model="gpt-5", ...)
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