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Grok 4.20
xai·xai/grok-4.20·GA·Closed·grok series·NEW
Grok model for agentic tool use, reasoning, coding, and live assistance
At a glance
Reference price$2.00 / $6.00 per 1M
Cache read $1.00 · NanoGPT
Lowest paid$1.25 / $2.50
OpenRouter Gateway · 1.6× spread
Context2,000,000
⚠ Providers report 1,000,000–2,000,000; the table below is authoritative
Output limit131,072
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ Temperature✓ Attachments
Modalities
TextImagePDF
Knowledge cutoff2025-09-01
Released / updated2026-03-31 / 2026-06-11
Quality & performanceArtificial Analysis · Intelligence Index v4.1 · rep. tier Reasoning
Intelligence38
Value24
Coding—
Agentic—
Output speed99 tok/s
TTFT22.33 s
Value formulaIQ 38 ÷ min blended $1.563 = 24
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
Available at 4 providers4 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| OpenRouter | Gateway | $1.25 tiered >200K: $2.50 | $2.50 | $0.20 | — | 2,000,000 | 2,000,000 | |
| Merge Gateway xai/grok-4.20-0309-reasoning | Gateway | $1.25 tiered >200K: $2.50 | $2.50 | $0.20 | — | 1,000,000 ⚠ | 1,000,000 | |
| Venice AI grok-4-20 | Gateway | $1.42 tiered >200K: $2.83 | $2.83 | $0.23 | — | 2,000,000 | 128,000 | |
| NanoGPT | Gateway | $2.00 | $6.00 | $1.00 | — | 2,000,000 | 131,072 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1OpenRouter$249.00
2Merge Gateway$249.00
3Venice AI$282.70
4NanoGPT$580.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = loweffort = mediumeffort = high
3 / 4 providers expose no reasoning control (reasoning_options: []).
Related models
Grok 4.6same series$2.00 / $6.00Grok 4.6 (xAI)same series$2.00 / $6.00Grok 4.6 (AWS Bedrock)same series$2.00 / $6.00DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28DeepSeek V4 Flash 0731cheaper alternative$0.479 / $1.44MiniMax-M3cheaper alternative$0.30 / $1.20
Price historyone sample accumulated per data sync
Input listOutput listMin blended