Claude 4 Sonnet vs GPT-4.5 Preview: Benchmarks, Pricing, and Context Window Comparison
Claude 4 Sonnet vs GPT-4.5 Preview compares provider, context window, token pricing, benchmark performance, and release timeline in one side-by-side view. Use this page to quickly identify which model is a better fit for your production constraints, quality targets, and estimated cost per request.
Verdict
Claude 4 Sonnet has lower listed token pricing, while GPT-4.5 Preview can still be preferable if benchmark results better match your workload.
Author: Mirai Minds Research Team
Last updated:
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Overview
Claude 4 Sonnet was released 3 months after GPT-4.5 Preview.
 Claude 4 Sonnet |  GPT-4.5 Preview | |
|---|---|---|
Provider The entity that provides this model. | Anthropic | OpenAI |
Input Context Window The number of tokens supported by the input context window. | 200K tokens | 128K tokens |
Maximum Output Tokens The number of tokens that can be generated by the model in a single request. | 64000 tokens | 16.4K tokens |
Release Date When the model was first released. | May 22, 2025 over 1 yearago 2025-05-22 | Feb 27, 2025 over 1 year 2025-02-27 |
Leaderboard
| Claude 4 Sonnet | GPT-4.5 Preview | |
|---|---|---|
Rank | Unknown | Unknown |
Arena Elo | Not specified. | Not specified. |
95% CI | Not specified. | Not specified. |
Votes | Not specified. | Not specified. |
License | Not specified. | Not specified. |
Knowledge Cutoff | Unknown | Unknown |
Pricing
| Claude 4 Sonnet | GPT-4.5 Preview | |
|---|---|---|
Input Cost of input data provided to the model. | $3 per million tokens | $75.00 per million tokens |
Output Cost of output tokens generated by the model. | $15 per million tokens | $150.00 per million tokens |
Benchmarks
Compare relevant benchmarks between Claude 4 Sonnet and GPT-4.5 Preview Instruct.
| Claude 4 Sonnet | GPT-4.5 Preview | |
|---|---|---|
MMLU Evaluating LLM knowledge acquisition in zero-shot and few-shot settings. | Benchmark not available. | Benchmark not available. |
MMMU A wide ranging multi-discipline and multimodal benchmark. | 74.4 | 74.4 |
HellaSwag A challenging sentence completion benchmark. | Benchmark not available. | Benchmark not available. |