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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 4.5Grok-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 window200,000 tokens1,000,000 tokens
Max output32,000 tokens64,000 tokens
Modalitiestext, visiontext, vision
Reasoning modeNoYes
Released2025-112026-03
Speed148 t/s52 t/s

Cost at scale (3:1 blended)

Tokens / monthClaude Haiku 4.5Grok-4.20 ReasoningDelta
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 Free

FAQ

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

Claude Haiku 4.5 pricingGrok-4.20 Reasoning pricingvs Grok 4.3vs Gemini 3.1 Provs GPT-5.6 Terravs Gemini 3.6 FlashPremium model tests

Pricing verified 2026-04-06. Specs verified 2026-08-08.