Claude Sonnet 5 vs Grok 4.3
API pricing, context window and capabilities for Claude Sonnet 5 and Grok 4.3, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Sonnet 5 wins on coding and on intelligence. Grok 4.3 wins on price.
Price
Grok 4.3
Coding
Claude Sonnet 5
Intelligence
Claude Sonnet 5
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Sonnet 5 wins
- More serving providers (4 vs 1)
Grok 4.3 wins
- Cheaper input ($2.00 vs $1.25 /1M)
- Cheaper output ($10.00 vs $2.50 /1M)
- Higher max output (128K vs 1M)
- Has web search
Cheaper overall
Grok 4.3
$1.25 + $2.50 /1M
Larger context
Tied
More providers
Claude Sonnet 5
4 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude Sonnet 5 | Grok 4.3 | |
|---|---|---|
| Input $/1M | $2.00 | $1.25 best |
| Output $/1M | $10.00 | $2.50 best |
| Context window | 1M | 1M |
| Max output | 128K | 1M best |
| Serving providers | 4 best | 1 |
| Released | 2026-06-30 | 2026-04-18 |
Benchmarks
Artificial Analysis indices, side by side| Claude Sonnet 5 | Grok 4.3 | |
|---|---|---|
| Intelligence | 53.4 best | 37.6 |
| Coding | 71.5 best | 42.3 |
| GPQA Diamond | 91% best | 90% |
| Output speed | 67 t/s | 113 t/s best |
| Latency (TTFT) | 42.19s | 17.26s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Sonnet 5
via Amazon Bedrock
$20
Grok 4.3
via xAI
$8.75
Capabilities
feature support, side by side| Feature | Claude Sonnet 5 | Grok 4.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Sonnet 5 or Grok 4.3?
Grok 4.3 is cheaper for input ($2.00 vs $1.25 per 1M tokens). Grok 4.3 is cheaper for output ($10.00 vs $2.50 per 1M tokens).
What is the context window difference between Claude Sonnet 5 and Grok 4.3?
Both Claude Sonnet 5 and Grok 4.3 have about a 1M-token context window.
How do Claude Sonnet 5 and Grok 4.3 compare on benchmarks?
On the tracked Artificial Analysis indices, Claude Sonnet 5 leads on coding, and Claude Sonnet 5 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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