Pricing, context window, capabilities, and release date — pulled from each provider's public docs. Both are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.
Both models stream in parallel through your own AIgateway key. Tokens, latency, and cost update as they arrive.
| Grok 4.6 xai/grok-4.6 | Grok 4.20 Reasoning xai/grok-4.20-0309-reasoning | |
|---|---|---|
| Provider | xAI | xAI |
| Family | Grok 4 | Grok 4 |
| Modality | text | text |
| Context window | 500,000 tok | 2,000,000 tok |
| Max output | 32,768 tok | 32,768 tok |
| Released | 2026-08-12 | 2026-05-22 |
| Input price | $1.00 /1M | $2.00 /1M |
| Output price | $1.00 /1M | $6.00 /1M |
| Cache read | — | — |
| Tools | — | — |
| Streaming | yes | yes |
| Vision | yes | yes |
| JSON mode | — | — |
| Reasoning | — | — |
| Prompt caching | — | — |
xAI's Grok 4.6, a flagship reasoning model for coding, agentic tasks, and visual work. Accepts text and image inputs, and supports function calling and structured outputs.
xAI's Grok 4.20 reasoning model. Uses extended thinking to work through complex problems, returning a reasoning trace alongside the final answer.
# pip install aigateway-py openai
# aigateway-py: sub-accounts, evals, replays, jobs, webhook verify.
# openai SDK: chat/embeddings/images/audio — drop-in compat per our SDK's own guidance.
from openai import OpenAI
client = OpenAI(
base_url="https://api.aigateway.sh/v1",
api_key="sk-aig-...",
)
# Try Grok 4.6
client.chat.completions.create(
model="xai/grok-4.6",
messages=[{"role":"user","content":"hello"}],
)
# Try Grok 4.20 Reasoning — same client, same key
client.chat.completions.create(
model="xai/grok-4.20-0309-reasoning",
messages=[{"role":"user","content":"hello"}],
)