Anthropic (Claude) vs XAI (Grok): API Pricing Compared
Anthropic (Claude) vs XAI (Grok) — or XAI (Grok) vs Anthropic (Claude): each developer's priced lineup, cheapest model and highest-ECI model side by side, built from the same data as the per-developer pricing pages. This page does not rank the two developers.
Anthropic (Claude)
19 models with published pricing
$0.20–$20.00 per 1M tokens blended
Cheapest: Claude Haiku 5.5 at $0.20/1M blended
Highest ECI: Claude Opus 5.5 (168.4)
XAI (Grok)
8 models with published pricing
$1.25–$3.00 per 1M tokens blended
Cheapest: Grok Build 0.1 at $1.25/1M blended
Highest ECI: Grok 4.6 (157.9)
Top priced models by ECI
Anthropic (Claude)
| Model | ECI | Blended $/1M |
|---|---|---|
| Claude Opus 5.5 | 168.4 | $8.00 |
| Claude Fable 5.1 | 166.9 | $20.00 |
| Claude Sonnet 5.5 | 166.2 | $4.00 |
| Claude Opus 5 | 164.4 | $10.00 |
| Claude Fable 5 | 164.2 | $20.00 |
| Claude Haiku 5.5 | 160.2 | $0.20 |
| Claude Opus 4.8 | 159.9 | $10.00 |
| Claude Opus 4.7 | 157.6 | $10.00 |
XAI (Grok)
| Model | ECI | Blended $/1M |
|---|---|---|
| Grok 4.6 | 157.9 | $3.00 |
| Grok 4.7 | 156.1 | $3.00 |
| Grok 4.5 | 155.1 | $3.00 |
| Grok 4.20 (Non-Reasoning) | — | $1.5625 |
| Grok 4.20 (Reasoning) | — | $1.5625 |
| Grok 4.3 | — | $1.5625 |
| Grok Build 0.1 | — | $1.25 |
| x-AI/Grok-Code-Fast 1 | — | $1.25 |
All Anthropic (Claude) pricing All XAI (Grok) pricing
FAQ
How many Anthropic (Claude) and XAI (Grok) models have published API pricing?
Anthropic (Claude) has 19 priced models, from $0.20 to $20.00 per 1M tokens blended. XAI (Grok) has 8 priced models, from $1.25 to $3.00 per 1M tokens blended.
What is the cheapest Anthropic (Claude) model and the cheapest XAI (Grok) model?
The cheapest Anthropic (Claude) model is Claude Haiku 5.5 at $0.20/1M blended tokens. The cheapest XAI (Grok) model is Grok Build 0.1 at $1.25/1M blended tokens.
Which Anthropic (Claude) and XAI (Grok) models have the highest ECI?
Anthropic (Claude)'s highest-ECI priced model is Claude Opus 5.5 at 168.4; XAI (Grok)'s highest-ECI priced model is Grok 4.6 at 157.9. ECI is Epoch AI's Capabilities Index.
Where does the Anthropic (Claude) vs XAI (Grok) pricing data come from?
Prices come from models.dev and LiteLLM (open MIT-licensed catalogs) and ECI scores from Epoch AI (CC BY 4.0). This page states the numbers side by side and does not rank the two developers — see /data-sources/.