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Claude Haiku 4.5 vs Grok 4.20

At a glance
AnthropicClaude Haiku 4.5

Fast and efficient with near-frontier intelligence.

75200K ctx$1.00/$5.00 per M#41/92
xAIGrok 4.20

xAI's newest flagship model with industry-leading speed and agentic tool calling.

862M ctx$1.25/$2.50 per M#12/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
AnthropicClaude Haiku 4.5
Reasoning
CodingInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI75.3
Reasoning & Knowledge
Graduate Science60.5%
Math
Math Problems86.9%Competition Math35.8%Research Math4.1%
Agentic
Terminal Tasks29.8%Novel Reasoning1.3%
xAIGrok 4.20
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
SmarterCheaper
Capability
CapabilityECI85.7
Reasoning & Knowledge
Graduate Science—
Math
Math Problems—Competition Math—Research Math—
Agentic
Terminal Tasks57.3%Novel Reasoning65.1%
Specs
AnthropicClaude Haiku 4.5
200K
Context
64K
Max output
Oct 2025
Released
xAIGrok 4.20
2M
Context
16K
Max output
Mar 2026
Released
Capabilities
AnthropicClaude Haiku 4.5
Vision
Audio
Reasoning
xAIGrok 4.20
Vision
Audio
Reasoning
Pricing
AnthropicClaude Haiku 4.5
Live pricing, shown before you run
Input$1.00/M tokens
Output$5.00/M tokens
Cache read$0.10/M tokens
Cache write$1.25/M tokens
Web search$0.01/search
xAIGrok 4.20
Live pricing, shown before you run
Input$1.25/M tokens
Output$2.50/M tokens
Cache read$0.20/M tokens
Web search$0.005/search
Chat with Claude Haiku 4.5Go to model
Chat with Grok 4.20Go to model
Frequently Asked Questions: Claude Haiku 4.5 vs Grok 4.20▼

Which is better, Claude Haiku 4.5 or Grok 4.20?

▼

Based on the Capability Index, Grok 4.20 scores higher (85.7 vs 75.3). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Claude Haiku 4.5 or Grok 4.20?

▼

Grok 4.20 has a lower blended cost. Claude Haiku 4.5: $1.00 input / $5.00 output. Grok 4.20: $1.25 input / $2.50 output.

Which has a larger context window, Claude Haiku 4.5 or Grok 4.20?

▼

Grok 4.20 has a larger context window: Claude Haiku 4.5 supports 200K tokens vs Grok 4.20 at 2M tokens.

Do both Claude Haiku 4.5 and Grok 4.20 support vision?

▼

Yes, both Claude Haiku 4.5 and Grok 4.20 support vision/image input.

What are the key differences between Claude Haiku 4.5 and Grok 4.20?

▼

Key differences: Grok 4.20 has a notably higher capability index (10.4 point gap). Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Haiku 4.5 and Grok 4.20 for free on idapt.app to see which performs better for your specific needs.

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