Model Comparison
Claude 3.7 Sonnet vs Grok 4.5Which is better in 2026?
Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is 2.0x cheaper per token.
Verdict: Claude 3.7 Sonnet vs Grok 4.5 — which is better?
Claude 3.7 Sonnet (by Anthropic) and Grok 4.5 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
Claude 3.7 Sonnet outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (GPQA). Grok 4.5 significantly outperforms across most benchmarks.
On price, Grok 4.5 is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose Claude 3.7 Sonnet if…
- you want predictable pricing at $3.00/M input and $15.00/M output
Choose Grok 4.5 if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- cost matters — it's about 2.0x cheaper per token
- you process long inputs — it offers a 500,000 token context window
- you want the most recent training data — it shipped Jul 2026
Performance Benchmarks
Comparative analysis across standard metrics
Claude 3.7 Sonnet outperforms in 0 benchmarks, while Grok 4.5 is better at 1 benchmark (GPQA).
Grok 4.5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.7 Sonnet ($3.00/1M tokens) is 1.5x more expensive than Grok 4.5 ($2.00/1M tokens).
For output processing, Claude 3.7 Sonnet ($15.00/1M tokens) is 2.5x more expensive than Grok 4.5 ($6.00/1M tokens).
In conclusion, Claude 3.7 Sonnet is more expensive than Grok 4.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4.5 accepts 500,000 input tokens compared to Claude 3.7 Sonnet's 200,000 tokens. Only Claude 3.7 Sonnet specifies output context (128,000 tokens).
Input Capabilities
Supported data types and modalities
Both Claude 3.7 Sonnet and Grok 4.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3.7 Sonnet
Grok 4.5
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
Claude 3.7 Sonnet was released on 2025-02-24, while Grok 4.5 was released on 2026-07-16.
Grok 4.5 is 17 months newer than Claude 3.7 Sonnet.
Feb 24, 2025
1.4 years ago
Jul 16, 2026
2 days ago
1.4yr newerKnowledge Cutoff
When training data ends
Grok 4.5 has a documented knowledge cutoff of 2026-02-01, while Claude 3.7 Sonnet's cutoff date is not specified.
We can confirm Grok 4.5's training data extends to 2026-02-01, but cannot make a direct comparison without Claude 3.7 Sonnet's cutoff date.
—
Feb 2026
Provider Availability
Claude 3.7 Sonnet is available from Anthropic, Bedrock, Google. Grok 4.5 is available from xAI.
Claude 3.7 Sonnet
Grok 4.5
Outputs Comparison
Key Takeaways
Claude 3.7 Sonnet
View detailsAnthropic
No standout differentiators in the data we have for this pair.
Claude 3.7 SonnetGrok 4.5Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Claude 3.7 Sonnet and Grok 4.5 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Claude 3.7 Sonnet vs Grok 4.5.