Claude 3.7 Sonnet vs Grok 4
Claude 3.7 Sonnet (2024) and Grok 4 (2026) are frontier-tier reasoning models from Anthropic and xAI. Claude 3.7 Sonnet ships a 200K-token context window, while Grok 4 ships a 256k-token context window. On MMLU PRO, Grok 4 leads by 6.7 pts. On pricing, Claude 3.7 Sonnet costs $3/1M input tokens versus $3/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Pick Grok 4 for general evaluation; Claude 3.7 Sonnet is better when coding workflow support matters more.
Specs
| Released | 2024-03-04 | 2026-03-01 |
| Context window | 200K | 256k |
| Parameters | — | — |
| Architecture | decoder only | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2024-11 | - |
Pricing and availability
| Claude 3.7 Sonnet | Grok 4 | |
|---|---|---|
| Input price | $3/1M tokens | $3/1M tokens |
| Output price | $15/1M tokens | $15/1M tokens |
| Providers |
Capabilities
| Claude 3.7 Sonnet | Grok 4 | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
| Benchmark | Claude 3.7 Sonnet | Grok 4 |
|---|---|---|
| MMLU PRO | 80.3 | 87.0 |
| SWE-bench Verified | 70.3 | 76.7 |
| Aider Polyglot | 64.9 | 79.6 |
Deep dive
On shared benchmark coverage, MMLU PRO has Claude 3.7 Sonnet at 80.3 and Grok 4 at 87, with Grok 4 ahead by 6.7 points; SWE-bench Verified has Claude 3.7 Sonnet at 70.3 and Grok 4 at 76.7, with Grok 4 ahead by 6.4 points; Aider Polyglot has Claude 3.7 Sonnet at 64.9 and Grok 4 at 79.6, with Grok 4 ahead by 14.7 points. The largest visible gap is 14.7 points on Aider Polyglot, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on vision: Claude 3.7 Sonnet, function calling: Claude 3.7 Sonnet, and tool use: Claude 3.7 Sonnet. Both models share multimodal input, reasoning mode, structured outputs, and code execution, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Claude 3.7 Sonnet lists $3/1M input and $15/1M output tokens, while Grok 4 lists $3/1M input and $15/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Claude 3.7 Sonnet lower by about $0 per million blended tokens. Availability is 6 providers versus 3, so concentration risk also matters.
Choose Claude 3.7 Sonnet when coding workflow support and broader provider choice are central to the workload. Choose Grok 4 when coding workflow support and larger context windows are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Claude 3.7 Sonnet or Grok 4?
Grok 4 supports 256k tokens, while Claude 3.7 Sonnet supports 200K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Claude 3.7 Sonnet or Grok 4?
Claude 3.7 Sonnet is cheaper on tracked token pricing. Claude 3.7 Sonnet costs $3/1M input and $15/1M output tokens. Grok 4 costs $3/1M input and $15/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Claude 3.7 Sonnet or Grok 4 open source?
Claude 3.7 Sonnet is listed under Proprietary. Grok 4 is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Claude 3.7 Sonnet or Grok 4?
Claude 3.7 Sonnet has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Claude 3.7 Sonnet or Grok 4?
Both Claude 3.7 Sonnet and Grok 4 expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Claude 3.7 Sonnet and Grok 4?
Claude 3.7 Sonnet is available on Snowflake Cortex, GCP Vertex AI, Replicate API, OpenRouter, and AWS Bedrock. Grok 4 is available on Microsoft Foundry, OpenRouter, and Replicate API. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.