Claude 3.7 Sonnet vs Grok 4
Claude 3.7 Sonnet (2024) and Grok 4 (2025) 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. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Pick Grok 4 for general evaluation; token pricing is tied, so keep Claude 3.7 Sonnet only for already-validated prompts or route constraints.
Decision scorecard
Local evidence first| Signal | Claude 3.7 Sonnet | Grok 4 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 200K | 256K |
| Cheapest output | $15/1M tokens | $15/1M tokens |
| Provider routes | 6 tracked | 4 tracked |
| Shared benchmarks | 4 shared | MMLU PRO leader |
Decision tradeoffs
- Claude 3.7 Sonnet has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Claude 3.7 Sonnet for Coding, RAG, and Agents.
- Grok 4 holds a shared-benchmark lead on MMLU PRO, ahead by 6.7 points.
- Grok 4 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Local decision data tags Grok 4 for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Claude 3.7 Sonnet
$6,150
Cheapest tracked route/tier: GCP Vertex AI
Grok 4
$6,150
Cheapest tracked route/tier: Microsoft Foundry
Estimated monthly gap: $0.00. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter and Replicate API; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Provider overlap exists on Replicate API and OpenRouter; start route-level A/B tests there.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-03-04 | 2025-07-09 |
| Context window | 200K | 256K |
| Parameters | — | — |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Restricted |
| Knowledge cutoff | 2024-11 | - |
Pricing and availability
| Pricing attribute | Claude 3.7 Sonnet | Grok 4 |
|---|---|---|
| Input price | $3/1M tokens | $3/1M tokens |
| Output price | $15/1M tokens | $15/1M tokens |
| Providers |
Capabilities
| Capability | Claude 3.7 Sonnet | Grok 4 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| JSON / Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Claude 3.7 Sonnet | Grok 4 |
|---|---|---|
| MMLU PRO | 80.3 | 87.0 |
| SWE-bench Verified | 70.3 | 76.7 |
| LiveCodeBench | 68.9 | 79.0 |
| 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; LiveCodeBench has Claude 3.7 Sonnet at 68.9 and Grok 4 at 79, with Grok 4 ahead by 10.1 points. The largest visible gap is 10.1 points on LiveCodeBench, 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 is close: both models cover vision, multimodal input, reasoning mode, JSON / Tool use, and JSON / Tool use. That makes context budget, benchmark fit, and provider maturity more important than a simple checklist. If your application depends on one integration detail, verify it against the provider route you plan to use, not just the base model listing.
For cost, Claude 3.7 Sonnet lists $3/1M input and $15/1M output tokens on the cheapest tracked provider, while Grok 4 lists $3/1M input and $15/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend is tied on the cheapest tracked routes. Availability is 6 providers versus 4, 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?
Neither is cheaper on tracked token pricing. Both list $3/1M input and $15/1M output tokens on the cheapest tracked route. Provider discounts, batch pricing, or route-specific tiers 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?
Both Claude 3.7 Sonnet and Grok 4 expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
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, Replicate API, and xAI Console. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-10-17. Data sourced from public model cards and provider documentation.