GPT-5.1 vs Grok 4.20: API Price & Benchmark Comparison (INR)
Side-by-side pricing
| GPT-5.1 | Grok 4.20 | |
|---|---|---|
| Input price / 1M tokens | ₹128.96 | ₹128.96 |
| Output price / 1M tokens | ₹1,032 | ₹257.92 |
| Context window | 400,000 | 2,000,000 |
| Provider | OpenAI | xAI |
Velona effective INR prices, refreshed every 6 hours (last: 2026-07-28T17:32:59Z).
When to pick which
Input pricing matches at $1.25 per million, but Grok 4.20's output is 4x cheaper ($2.50 vs $10) and its context window is 5x larger (2M vs 400K tokens), a striking combination for output-heavy or long-context work. GPT-5.1 remains the stronger all-round model on coding benchmarks, structured output, and ecosystem maturity, with far more tooling built around it. Choose Grok when you generate a lot of tokens, need massive context, or want real-time-flavoured conversational style. Choose GPT-5.1 for agentic coding, strict schemas, and workloads where the broader OpenAI ecosystem saves engineering time.
Benchmarks
GPT-5.1
Benchmarks
Independent scores from Artificial Analysis.
Grok 4.20
Benchmarks
Independent scores from Artificial Analysis.
Cost calculator for both models
Frequently asked questions
Which is cheaper: GPT-5.1 or Grok 4.20?
On input tokens, GPT-5.1 costs ₹128.96/1M and Grok 4.20 costs ₹128.96/1M through Velona. Output tokens: ₹1,032 vs ₹257.92 per 1M.
Can I switch between GPT-5.1 and Grok 4.20 without changing code?
Yes. Both are behind Velona's single gateway API. Change the model id in your request body and everything else stays the same, including your INR wallet.
Are these prices current?
Prices are regenerated every 6 hours from live provider pricing and the current USD→INR rate, so the figures on this page track what you'd actually be billed.
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