Claude Sonnet 4.5 vs GPT-5.1: API Price & Benchmark Comparison (INR)
Side-by-side pricing
| Claude Sonnet 4.5 | GPT-5.1 | |
|---|---|---|
| Input price / 1M tokens | ₹309.50 | ₹128.96 |
| Output price / 1M tokens | ₹1,548 | ₹1,032 |
| Context window | 1,000,000 | 400,000 |
| Provider | Anthropic | OpenAI |
Velona effective INR prices, refreshed every 6 hours (last: 2026-07-28T17:32:59Z).
When to pick which
GPT-5.1 has cheaper input ($1.25 vs $3 per million) and matching $10-ish output pricing, while Sonnet 4.5 offers a 1M-token context window against GPT-5.1's 400K. Sonnet 4.5 has a stronger reputation for sustained agentic coding, following multi-step instructions over long trajectories without drifting. GPT-5.1 counters with adjustable reasoning effort and a broader ecosystem of tutorials and libraries. For a coding agent or anything above 400K tokens of context, pick Sonnet. For general-purpose apps where input tokens dominate your bill, GPT-5.1 is meaningfully cheaper per request.
Benchmarks
Claude Sonnet 4.5
No benchmark data.
GPT-5.1
Benchmarks
Independent scores from Artificial Analysis.
Cost calculator for both models
Frequently asked questions
Which is cheaper: Claude Sonnet 4.5 or GPT-5.1?
On input tokens, Claude Sonnet 4.5 costs ₹309.50/1M and GPT-5.1 costs ₹128.96/1M through Velona. Output tokens: ₹1,548 vs ₹1,032 per 1M.
Can I switch between Claude Sonnet 4.5 and GPT-5.1 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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