Claude Haiku 4.5vsGrok 4.20 Beta
Claude Haiku 4.5 | Grok 4.20 Beta | |
|---|---|---|
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.00 | $1.25 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $5.00 | $2.50 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $0.10 | $0.20 |
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $1.00Amazon Bedrock | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $5.00Amazon Bedrock | — |
| Benchmarks | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 77% | 56% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 73.3% | 76.7% |
| BenchmarksPublished by one model only | ||
ARC-AGI-2Abstract reasoning — Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | — | 53.3% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 73% | — |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Oct 15 2025 | Feb 17 2026 |
| Access | Proprietary | Proprietary |
Other comparisons
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Frequently asked questions
Claude Haiku 4.5 and Grok 4.20 Beta are evenly matched across the 2 benchmarks they both report (BullshitBench v2, SWE-Bench Verified). Claude Haiku 4.5 is cheaper on input: $1.00 vs $1.25 per million tokens. Grok 4.20 Beta is cheaper on output: $2.50 vs $5.00 per million tokens. Figures are base-tier rates. Claude Haiku 4.5 shipped 125 days before Grok 4.20 Beta, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, Claude Haiku 4.5 leads at 77% vs Grok 4.20 Beta at 56%. On SWE-Bench Verified, Grok 4.20 Beta leads at 76.7% vs Claude Haiku 4.5 at 73.3%.