Claude Opus 4.8 vs Grok 4.3
API pricing, context window and capabilities for Claude Opus 4.8 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 Opus 4.8 wins on coding and on intelligence. Grok 4.3 wins on price.
Price
Grok 4.3
Coding
Claude Opus 4.8
Intelligence
Claude Opus 4.8
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus 4.8 wins
- More serving providers (4 vs 1)
Grok 4.3 wins
- Cheaper input ($5.00 vs $1.25 /1M)
- Cheaper output ($25.00 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 Opus 4.8
4 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude Opus 4.8 | Grok 4.3 | |
|---|---|---|
| Input $/1M | $5.00 | $1.25 best |
| Output $/1M | $25.00 | $2.50 best |
| Context window | 1M | 1M |
| Max output | 128K | 1M best |
| Serving providers | 4 best | 1 |
| Released | 2026-05-28 | 2026-04-18 |
Benchmarks
Artificial Analysis indices, side by side| Claude Opus 4.8 | Grok 4.3 | |
|---|---|---|
| Intelligence | 55.7 best | 37.6 |
| Coding | 74.3 best | 42.3 |
| GPQA Diamond | 92% best | 90% |
| Output speed | 68 t/s | 113 t/s best |
| Latency (TTFT) | 38.57s | 17.26s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 4.8
via Amazon Bedrock
$50
Grok 4.3
via xAI
$8.75
Capabilities
feature support, side by side| Feature | Claude Opus 4.8 | Grok 4.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus 4.8 or Grok 4.3?
Grok 4.3 is cheaper for input ($5.00 vs $1.25 per 1M tokens). Grok 4.3 is cheaper for output ($25.00 vs $2.50 per 1M tokens).
What is the context window difference between Claude Opus 4.8 and Grok 4.3?
Both Claude Opus 4.8 and Grok 4.3 have about a 1M-token context window.
How do Claude Opus 4.8 and Grok 4.3 compare on benchmarks?
On the tracked Artificial Analysis indices, Claude Opus 4.8 leads on coding, and Claude Opus 4.8 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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