Grok Build 0.1 vs Grok 4.20
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
Grok Build 0.1 is 20% cheaper on blended cost ($1.50 vs $1.88/Mtok) — note: different model classes (coding vs mid tier)
| Specification |
by xAI
|
by xAI
|
|---|---|---|
| Overview | ||
| Status | Current coding | Current mid tier |
| Released | Feb 1, 2026 | Oct 1, 2025 |
| Pricing per million tokens | ||
| Input | $1.00/Mtok | $1.25/Mtok |
| Output | $2.00/Mtok | $2.50/Mtok |
| Blended avg | $1.50/Mtok | $1.88/Mtok |
| Cached input | — | $0.200/Mtok |
| Specifications | ||
| Context window | 256K tokens | 256K tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
text
|
textimage
|
| Benchmarks sources: Artificial Analysis / xAI model card | ||
| GPQA Diamond | — | 78 vendor |
| SWE-Bench Verified | — | 58 vendor |
| Humanity's Last Exam | — | 32 vendor |
| ARC-AGI 2 | — | 38 vendor |
| AIME 2025 | — | 80 vendor |
| MMMLU | — | 84 vendor |
| BFCL | — | 75 vendor |
| HumanEval | — | 88 vendor |
| MATH 500 | — | 85 vendor |
| Independent composite scores each on its own scale — not part of the average above | ||
| AA Intelligence Index | 40 | — |
| LMSYS Chatbot Arena | — | 1474.4 ELO |
| Providers | ||
| Available from |
xAI — $1.00/$2.00/Mtok
|
xAI — $1.25/$2.50/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Grok Build 0.1 | Grok 4.20 | Savings |
|---|---|---|---|
| 1M tokens | $1.5 | $1.88 | $0.38 (20.3%) |
| 10M tokens | $15 | $18.75 | $3.75 (20%) |
| 100M tokens | $150 | $187.5 | $37.5 (20%) |
| 1000M tokens | $1500 | $1875 | $375 (20%) |
When to pick which
distilled from the pricing and spec data above
Pick Grok Build 0.1 if…
- cost dominates: $1.50/Mtok blended vs $1.88 — 20% less on the same 50/50 token mix
Pick Grok 4.20 if…
- your workload re-reads context (agents, RAG, long chats): cached input costs $0.200/Mtok — 84% off its list input price, a discount Grok Build 0.1 doesn't offer
Try Grok Build 0.1 on xAI
The cheaper option here — Grok Build 0.1 costs $1.50/Mtok blended on xAI.
Summary
Grok Build 0.1 by xAI costs $1.00/Mtok input and $2.00/Mtok output, with a 256K-token context window. It supports text input.
Grok 4.20 by xAI costs $1.25/Mtok input and $2.50/Mtok output, with a 256K-token context window. It supports text, image input.
On a blended cost basis, Grok Build 0.1 is 20% cheaper than Grok 4.20.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.
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