Claude Opus 5.5 vs DeepSeek V4 Pro
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, DeepSeek V4 Pro costs less (about 80% less than Claude Opus 5.5). 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": "anthropic/claude-opus-5-5", "messages": [{"role": "user", "content": "Hello"}]}'
# the other one: change the model string
-d '{"model": "deepseek/deepseek-v4-pro", ...}'Common questions
Which is cheaper, Claude Opus 5.5 or DeepSeek V4 Pro?
DeepSeek V4 Pro is cheaper on a typical mix of 75% input and 25% output tokens, by about 80%. 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. Claude Opus 5.5 offers 1M tokens.
Can I switch between Claude Opus 5.5 and DeepSeek V4 Pro without changing code?
Yes. Both are callable at https://rapidrouter.ai/api/v1 with the same OpenAI-compatible request; only the model string changes (anthropic/claude-opus-5-5 or deepseek/deepseek-v4-pro).
How do I pay for Claude Opus 5.5 or DeepSeek V4 Pro 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.