Claude 3.5 Sonnet vs Grok 4
Claude 3.5 Sonnet vs Grok 4: Claude 3.5 Sonnet is cheaper for input-heavy usage ($3.00/M vs $3.00/M input tokens), while Grok 4 is better for long-context tasks (256,000 tokens).
Direct answer: choose Claude 3.5 Sonnet for lower token spend and choose Grok 4 when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude 3.5 Sonnet
Grok 4
Cost Differences
Grok 4 costs less than Claude 3.5 Sonnet
Quick Recommendation
Winner for direct API pricing: Claude 3.5 Sonnet. At the default workload, Claude 3.5 Sonnet saves about $0.00/month ($0.00/year) versus Grok 4.
Feature Comparison
| Feature | Claude 3.5 Sonnet | Grok 4 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input Price | $3.00/1M tokens | $3.00/1M tokens |
| Output Price | $15.00/1M tokens | $15.00/1M tokens |
| Context Window | 200,000 tokens | 256,000 tokens |
| Max Output | 8,192 tokens | 131,072 tokens |
| Category | balanced | reasoning |
| Capabilities | textvisioncode | textvisionreasoningcode |
| Release Date | 10/22/2024 | 7/9/2025 |
Claude 3.5 Sonnet vs Grok 4: Which Should You Choose?
Choosing between Claude 3.5 Sonnet and Grok 4 depends on your priorities: cost efficiency, context length, or raw capability. Grok 4 is the more affordable option at $3.00/1M input tokens. Meanwhile, Grok 4 offers a significantly larger context window at 256,000 tokens vs 200,000 for Claude 3.5 Sonnet.
These models come from different providers — Anthropic and xAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to xAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude 3.5 Sonnet is a balanced model while Grok 4 is reasoning. This means they're optimized for different workloads. Grok 4 targets more demanding workloads, while Claude 3.5 Sonnet provides a cost-effective option for everyday tasks.
Output costs matter too. Claude 3.5 Sonnet charges $15.00/1M output tokens vs $15.00 for Grok 4.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude 3.5 Sonnet when:
- • You're already using Anthropic's API ecosystem
Choose Grok 4 when:
- • You need a larger context window (256,000 tokens)
- • You need more capabilities (reasoning)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
Pros and Caveats at a Glance
Claude 3.5 Sonnet
- • Input pricing: $3.00/M tokens
- • Output pricing: $15.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 8,192 tokens
Watch out for
- • Smaller context window than Grok 4
Grok 4
- • Input pricing: $3.00/M tokens
- • Output pricing: $15.00/M tokens
- • Context window: 256,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Trade-offs are minor in this matchup.
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude 3.5 Sonnet (Anthropic)
Grok 4 (xAI)
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Which is cheaper, Claude 3.5 Sonnet or Grok 4?▼
What is the context window difference between Claude 3.5 Sonnet and Grok 4?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Anthropic and xAI API pricing beyond this model matchup?▼
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