workhorse
Grok 3 vs Claude Sonnet 4 6
Side-by-side pricing, context window, features, and per-use-case verdict. Data sourced from LiteLLM, updated regularly.
Specifications
| Feature | Grok 3 | Claude Sonnet 4 6 |
|---|---|---|
| Provider | xai | anthropic |
| Model ID | xai/grok-3 | claude-sonnet-4-6 |
| Input / 1M tokens | $3.00 | $3.00 |
| Output / 1M tokens | $15.00 | $15.00 |
| Cached input / 1M | $0.75 | $0.30 |
| Context window | 131kk tokens | 1000kk tokens |
| Max output | 131kk tokens | 64kk tokens |
| Vision | ⬜ | ✅ |
| Function calling | ✅ | ✅ |
| Prompt caching | ✅ | ✅ |
| Web search | ✅ | ⬜ |
| JSON schema | ⬜ | ✅ |
Monthly cost comparison
No cache discount applied — pure token costs at three usage scales.
| Scale | Grok 3 | Claude Sonnet 4 6 | Winner |
|---|---|---|---|
| Small 1M in / 0.2M out | $6.00 | $6.00 | Grok 3 |
| Medium 10M in / 2M out | $60.00 | $60.00 | Grok 3 |
| Large 100M in / 20M out | $600 | $600 | Grok 3 |
Category winners
Cheapest input
Grok 3
$3.00/M
Cheapest output
Grok 3
$15.00/M
Larger context
Claude Sonnet 4 6
1000kk tokens · 663% larger window
More features
Claude Sonnet 4 6
4 / 5 capabilities
Better for…
High-volume RAG & repeated context
$0.30/M cached input — prompt caching makes repeated context retrieval significantly cheaper
Claude Sonnet 4 6
Short interactions & high-throughput APIs
$15.00/M output — 0% cheaper on output at scale
Grok 3
Long-document processing & large codebases
1000k context window vs 131k — 663% larger context
Claude Sonnet 4 6
Agentic workflows & tool use
Supports 4 of 5 tracked capabilities (vision, function calling, caching, web search, JSON schema)
Claude Sonnet 4 6
Deep-dive on each model
Pricing data sourced from LiteLLM and refreshed regularly. Always verify with each provider's official pricing page before making business decisions.