Claude Haiku 4.5 vs Grok-4.20 Reasoning — Price, Context, and Capability Compared
Verdict
Grok-4.20 Reasoning costs 1.5× more per blended million tokens than Claude Haiku 4.5. Grok-4.20 Reasoning has the larger context window (1,000,000 tokens). Default to Claude Haiku 4.5 unless you specifically need Grok-4.20 Reasoning's edge. Only Grok-4.20 Reasoning exposes an extended-thinking mode.
Spec comparison
| Claude Haiku 4.5 | Grok-4.20 Reasoning | |
|---|---|---|
| Price (input) | $1.00/M ✓ | $2.00/M |
| Price (output) | $5.00/M ✓ | $6.00/M |
| Blended price | $2.00/M ✓ | $3.00/M |
| Context window | 200,000 tokens | 1,000,000 tokens ✓ |
| Max output | 32,000 tokens | 64,000 tokens ✓ |
| Modalities | text, vision | text, vision |
| Reasoning mode | No | Yes |
| Released | 2025-11 | 2026-03 |
| Speed | 148 t/s ✓ | 52 t/s |
Cost at scale (3:1 blended)
| Tokens / month | Claude Haiku 4.5 | Grok-4.20 Reasoning | Delta |
|---|---|---|---|
| 1,000,000 | $2.00 | $3.00 | $1.00 (1.5×) |
| 10,000,000 | $20.00 | $30.00 | $10.00 (1.5×) |
| 100,000,000 | $200.00 | $300.00 | $100.00 (1.5×) |
Choose Claude Haiku 4.5 if…
- ✓Fastest Claude model
- ✓Lowest Claude pricing
- ✓Vision input included
- ✓Lightweight, high-volume operations like chat, tagging, and moderation.
Choose Grok-4.20 Reasoning if…
- ✓State-of-the-art document analysis at 1M context
- ✓Dedicated reasoning mode
- ✓Strong vision understanding
- ✓Long-document analysis and problems that benefit from explicit reasoning.
Run this exact matchup right now
Send the same prompt to Claude Haiku 4.5 and Grok-4.20 Reasoning side by side and see the outputs yourself.
Try Claude Haiku 4.5 vs Grok-4.20 Reasoning FreeFAQ
Is Claude Haiku 4.5 cheaper than Grok-4.20 Reasoning?
Claude Haiku 4.5 is cheaper, at $2.00 per million blended tokens vs $3.00 for Grok-4.20 Reasoning.
Which has the bigger context window, Claude Haiku 4.5 or Grok-4.20 Reasoning?
Grok-4.20 Reasoning has the larger context window: 1,000,000 tokens vs 200,000.
Can Claude Haiku 4.5 replace Grok-4.20 Reasoning for coding?
Both are viable for coding. Fastest Claude model (Claude Haiku 4.5) vs State-of-the-art document analysis at 1M context (Grok-4.20 Reasoning) — pick based on which strength matters more for your workload.
Which is faster, Claude Haiku 4.5 or Grok-4.20 Reasoning?
Claude Haiku 4.5 is faster: 148 t/s vs 52 t/s, measured on our speed benchmarks.
Related
Pricing verified 2026-04-06. Specs verified 2026-08-08.
