GPT OSS 20B vs Grok Build 0.1
Price in rupees, context and benchmarks side by side; same key, a one-string switch.
Scores from LMArena and Epoch AI, as published; a blank cell means not measured there.
What a month costs on each
On a typical 75/25 input-output mix, GPT OSS 20B costs less (about 95% less than Grok Build 0.1). Grok Build 0.1 takes the longer prompt at 256K tokens. Try your own numbers in the cost calculator.
Call either one
curl https://rapidrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "openai/gpt-oss-20b", "messages": [{"role": "user", "content": "Hello"}]}'
# the other one: change the model string
-d '{"model": "x-ai/grok-build-0.1", ...}'Common questions
Which is cheaper, GPT OSS 20B or Grok Build 0.1?
GPT OSS 20B is cheaper on a typical mix of 75% input and 25% output tokens, by about 95%. Through Rapid Router both are billed at the provider list price per million tokens, in rupees.
Which has the larger context window?
Grok Build 0.1, at 256K tokens. GPT OSS 20B offers 131K tokens.
Can I switch between GPT OSS 20B and Grok Build 0.1 without changing code?
Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (openai/gpt-oss-20b or x-ai/grok-build-0.1).
How do I pay for GPT OSS 20B or Grok Build 0.1 in India?
Top up a Rapid Router balance with UPI or a card in rupees, get a GST invoice on every recharge, and both models debit that balance per request.