GPT-4.5 vs Nova 2 Sonic
GPT-4.5 and Nova 2 Sonic are closely matched at 20.2 and 9.2 on the LLM Stats Score. Nova 2 Sonic is 100.3x cheaper per token.
OpenAI · Amazon · Updated for 2026
Which is better?
GPT-4.5 and Nova 2 Sonic are closely matched on the overall LLM Stats Score at 20.2 and 9.2.
In the 1 individual benchmarks reported for both models, Nova 2 Sonic wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Nova 2 Sonic is roughly 100.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Nova 2 Sonic also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-4.5
- you want predictable pricing at $75.00/M input and $150.00/M output
Choose Nova 2 Sonic
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 100.3x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Dec 2025
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
26 reported for GPT-4.5 · 4 for Nova 2 Sonic
GPT-4.5 outperforms in 0 benchmarks, while Nova 2 Sonic is better at 1 benchmark (ComplexFuncBench).
Nova 2 Sonic significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-4.5 ($75.00/1M tokens) is 227.3x more expensive than Nova 2 Sonic ($0.33/1M tokens).
For output processing, GPT-4.5 ($150.00/1M tokens) is 54.5x more expensive than Nova 2 Sonic ($2.75/1M tokens).
In conclusion, GPT-4.5 is more expensive than Nova 2 Sonic.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Nova 2 Sonic accepts 1,000,000 input tokens compared to GPT-4.5's 128,000 tokens. Nova 2 Sonic can generate longer responses up to 65,536 tokens, while GPT-4.5 is limited to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-4.5 and Nova 2 Sonic support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4.5
Nova 2 Sonic
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-4.5 was released on 2025-02-27, while Nova 2 Sonic was released on 2025-12-02.
Nova 2 Sonic is 9 months newer than GPT-4.5.
Feb 27, 2025
1.5 years ago
Dec 2, 2025
9 months ago
9mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-4.5 is available from OpenAI. Nova 2 Sonic is available from Bedrock.
GPT-4.5
Nova 2 Sonic
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4.5 and Nova 2 Sonic side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4.5 vs Nova 2 Sonic.