API cost decision in 10 seconds

GPT-5.1 Chat vs Nova Premier 1.0

Pick GPT-5.1 Chat for lower cost; pick Nova Premier 1.0 only if the larger context window matters more.

Page updated:  Data confirmed:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick GPT-5.1 Chat for lower cost; pick Nova Premier 1.0 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, GPT-5.1 Chat is estimated at $6.25 vs $8.75 for Nova Premier 1.0, saving $2.5 (28.6% lower).

Cost-first pickGPT-5.1 Chat
Context-first pickNova Premier 1.0
Sample savings$2.528.6%
10x traffic gap$25

Nova Premier 1.0 has more context, but GPT-5.1 Chat saves $2.5 on the standard workload. At 10x that traffic, the same price gap is about $25. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

GPT-5.1 Chat stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGPT-5.1 ChatNova Premier 1.0
Input-heavy / RAG5M input + 500K outputGPT-5.1 Chat$11.25$18.75
Balanced workload1M input + 1M outputGPT-5.1 Chat$11.25$15
Output-heavy chatbot1M input + 5M outputGPT-5.1 Chat$51.25$65
Cheaper input GPT-5.1 Chat $1.25 vs $2.5 / 1M

GPT-5.1 Chat is $1.25 cheaper per 1M input tokens (50% lower; 2x difference).

Cheaper output GPT-5.1 Chat $10 vs $12.5 / 1M

GPT-5.1 Chat is $2.5 cheaper per 1M output tokens (20% lower; 1.25x difference).

Larger context Nova Premier 1.0 128K vs 1M

Nova Premier 1.0 has 872K more context (7.81x larger).

Sample workload GPT-5.1 Chat $6.25 vs $8.75

GPT-5.1 Chat is $2.5 cheaper on the standard workload (28.6% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
GPT-5.1 Chat Calculating… Estimated API cost
Nova Premier 1.0 Calculating… Estimated API cost
Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

GPT-5.1 Chat has the lower input price; GPT-5.1 Chat has the lower output price; Nova Premier 1.0 offers the larger context window. For the 1M input plus 500K output sample, GPT-5.1 Chat is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $6.25 for GPT-5.1 Chat and $8.75 for Nova Premier 1.0.

Best Fit

Choose GPT-5.1 Chat when you care most about lower input-token price, and lower output-token price.

Choose Nova Premier 1.0 when you care most about larger context window.

Decision Notes
  • On the standard 1M input plus 500K output workload, GPT-5.1 Chat is estimated at $6.25 vs $8.75 for Nova Premier 1.0, saving $2.5 (28.6% lower).
  • GPT-5.1 Chat is $2.5 cheaper on the standard workload (28.6% lower).
  • GPT-5.1 Chat is $1.25 cheaper per 1M input tokens (50% lower; 2x difference).
  • GPT-5.1 Chat is $2.5 cheaper per 1M output tokens (20% lower; 1.25x difference).
  • Nova Premier 1.0 has 872K more context (7.81x larger).
Head-to-Head Specs
FeatureGPT-5.1 Chat
(OpenAI)		Nova Premier 1.0
(Amazon)
Input Price
prompt tokens per 1M		$1.25$2.5
Completion Price
per 1M tokens		$10$12.5
Sample Workload Cost
1M input + 500K output		$6.25$8.75
Context Window128K1M
Release Date

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGPT-5.1 ChatOn the standard 1M input plus 500K output workload, GPT-5.1 Chat is estimated at $6.25 vs $8.75 for Nova Premier 1.0, saving $2.5 (28.6% lower).
High-volume input processingGPT-5.1 ChatLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGPT-5.1 ChatLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workNova Premier 1.0A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • gpt-oss-120b (free) can replace GPT-5.1 Chat when lower sample workload cost matters most: $0.
  • gpt-oss-20b (free) can replace GPT-5.1 Chat when lower sample workload cost matters most: $0.
  • gpt-oss-20b can replace GPT-5.1 Chat when lower sample workload cost matters most: $0.1.
  • gpt-oss-120b can replace GPT-5.1 Chat when lower sample workload cost matters most: $0.13.
Larger context near this budget
  • Llama 4 Scout offers 10M context with $0.23 sample workload cost.
  • Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
  • Grok 4.20 offers 2M context with $2.5 sample workload cost.
  • GPT-5.4 offers 1.05M context with $10 sample workload cost.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

OpenAI catalog

Review all tracked OpenAI models before deciding whether this matchup is the right shortlist.

Open OpenAI models

Amazon catalog

Check other Amazon models with comparable pricing, context, or release timing.

Open Amazon models
GPT-5.1 Chat

GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...

Nova Premier 1.0

Amazon Nova Premier is the most capable of Amazon’s multimodal models for complex reasoning tasks and for use as the best teacher for distilling custom models.