modelbenchmark.io

Grok 4.20 Multi-Agent

xAI · grok-4-20-multi-agent

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Grok model for agentic tool use, reasoning, coding, and live assistance

Specification

xai listing

Context
1M
Max output
30K
Released
2026-03-09
Knowledge cutoff
2025-09-01
Retires
—
Open weights
no
Input
text, image, pdf
Output
text

Price

US dollars per million tokens · xai list price

Input
$1.25
Output
$2.50
Cache read
$0.20

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Batch inputxai$1.00
Batch outputxai$2.00

Batch input is 20% below the interactive input price at the same listing.

Long-context price tiers

the rate above each context threshold

AbovePrice$/M
200KCache read$0.40
200KInput$2.50
200KOutput$5.00

Available from 10 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
xaivendor$1.25$2.50$0.20—1M
30K
1M
—
kilo · x-ai$1.25$2.50$0.20—2M1.8M—
nano-gpt · x-ai$1.25$2.50$0.20—2M131K—
openrouter · x-ai$1.25$2.50$0.20—2M1.8M—
perplexity$1.25$2.50$0.20————
vercel · spacexai$1.25$2.50$0.20—2M2M—
poe$1.2626$2.5253$0.202—128K0—
venice$1.42$2.83$0.23—2M128K—
kyma · kyma$1.767$3.534——2M8K—
oci · oci$3.00$15.00——131K131K—

Price history

append-only observations · a listing writes a row only when its price moves

DateHostField$/M
2026-09-02nano-gpt · x-aiCache read$1.00
2026-10-19nano-gpt · x-aiCache read$0.20
2026-09-02poeCache read$0.20
2026-10-22poeCache read$0.202
2026-09-02nano-gpt · x-aiInput$2.00
2026-10-19nano-gpt · x-aiInput$1.25
2026-09-02poeInput$2.00
2026-10-22poeInput$1.2626
2026-09-02nano-gpt · x-aiOutput$6.00
2026-10-19nano-gpt · x-aiOutput$2.50
2026-09-02poeOutput$6.00
2026-10-22poeOutput$2.5253

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