DeepSeek V4 Pro vs GPT OSS 120B
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 120B costs less (about 96% less than DeepSeek V4 Pro). DeepSeek V4 Pro takes the longer prompt at 1M 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": "deepseek/deepseek-v4-pro", "messages": [{"role": "user", "content": "Hello"}]}'
# the other one: change the model string
-d '{"model": "openai/gpt-oss-120b", ...}'Common questions
Which is cheaper, DeepSeek V4 Pro or GPT OSS 120B?
GPT OSS 120B is cheaper on a typical mix of 75% input and 25% output tokens, by about 96%. Through Rapid Router both are billed at the provider list price per million tokens, in rupees.
Which has the larger context window?
DeepSeek V4 Pro, at 1M tokens. GPT OSS 120B offers 131K tokens.
Can I switch between DeepSeek V4 Pro and GPT OSS 120B without changing code?
Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (deepseek/deepseek-v4-pro or openai/gpt-oss-120b).
How do I pay for DeepSeek V4 Pro or GPT OSS 120B 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.