Nova 2 Pro vs GPT-5.1
Amazon against OpenAI, costed on the same three workloads. Neither is cheaper everywhere — which one wins depends on how much you read versus write.
Run this comparison on your own numbers
Monthly bill, side by side
| Workload | Nova 2 Pro | GPT-5.1 | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$6,553 | $6,553 | the same |
| Document summarizer 1,000 single-shot summaries a day |
$698 | $698 | the same |
| Coding agent 200 twelve-turn sessions a day |
$4,185 | $4,185 | the same |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Nova 2 Pro | GPT-5.1 | |
|---|---|---|
| Input, per 1M tokens | $1.25 | $1.25 |
| Output, per 1M tokens | $10 | $10 |
| Cached input | $0.3125 | $0.125 |
| Context window | 1M | 272K |
| Maximum output | 64K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | yes |
Beyond the price
- Nova 2 Pro reads up to 1M tokens of context in one request; GPT-5.1 stops at 272K.
- GPT-5.1 can write up to 128K tokens in one response, against 64K for Nova 2 Pro.
- Cached input costs 75% less than fresh input on Nova 2 Pro and 90% less on GPT-5.1, which matters most for workloads that resend the same prompt.
Run this comparison on your own numbers
Full detail: Nova 2 Pro pricing · GPT-5.1 pricing
More comparisons
Other head-to-heads that include Nova 2 Pro or GPT-5.1.
- Nova 2 Pro vs Claude Haiku 4.5
- Nova 2 Pro vs Command A
- Nova 2 Pro vs Mistral Medium 3.5
- GPT-5.1 vs Grok 4.3
- GPT-5.1 vs GLM-5
- GPT-5.1 vs GLM-5.1
Common questions
Which is cheaper, Nova 2 Pro or GPT-5.1?
Neither is cheaper everywhere — which one wins depends on how much you read versus write.
How much would Nova 2 Pro and GPT-5.1 cost each month?
On PromptSpend's standard workloads, per month: support chatbot: Nova 2 Pro $6,553, GPT-5.1 $6,553 (the same on both); document summarizer: Nova 2 Pro $698, GPT-5.1 $698 (the same on both); coding agent: Nova 2 Pro $4,185, GPT-5.1 $4,185 (the same on both). No prompt caching and no batch discount is assumed.
How do Nova 2 Pro and GPT-5.1 differ apart from price?
Nova 2 Pro reads up to 1M tokens of context in one request; GPT-5.1 stops at 272K. GPT-5.1 can write up to 128K tokens in one response, against 64K for Nova 2 Pro. Cached input costs 75% less than fresh input on Nova 2 Pro and 90% less on GPT-5.1, which matters most for workloads that resend the same prompt.