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Models / xAI

Grok 4.3

GA

Current flagship/recommended model for chat and coding per docs.x.ai/developers/models. Aliases: grok-4.3-latest, grok-latest. Modality 'text, image -> text' per official model page. Reasoning model (supports function calling, structured outputs, reasoning). Cached input $0.20/M confirmed on official model page. Max output tokens not published on the docs page (third-party sources describe 'no output token limit' but this is not officially stated). Knowledge cutoff not explicitly stated on the 4.x model page; the main models page only states the Nov 2024 cutoff for 'Grok 3 and Grok 4'. Release

Grok 4.3 by xAI costs $1.25 per 1M input tokens and $2.50 per 1M output tokens ($1.56/1M blended), with a 1M (1.000.000-token) context window. It is generally available (GA).

Last verified: 13 Aug 2026 · sourced from official provider documentation

Provider
xAI
Status
GA
Input price
$1.25 / 1M tokens
Output price
$2.50 / 1M tokens
Cached input
$0.2 / 1M tokens
Blended price
$1.56 / 1M tokens
Context window
1.000.000 tokens (1M)
Max output
—
Modality
text-in, image-in, text-out
Open weights
No — API only
Knowledge cutoff
—
Released
30 Apr 2026
API string
grok-4.3

Source: xAI official documentation ↗

See also

Compare Grok 4.3 head-to-head

Grok 4.3 vs Grok 4.20 (0309) Non-Reasoning→

$1.56 vs $1.56 blended /M · same family

Grok 4.3 vs Grok 4.20 (0309) Reasoning→

$1.56 vs $1.56 blended /M · same family

Grok 4.3 vs Grok 4.5→

$1.56 vs $3 blended /M · same family

FAQ

Grok 4.3 — questions & answers

How much does Grok 4.3 cost?

Grok 4.3 is priced at $1.25 per 1M input tokens and $2.50 per 1M output tokens ($1.56/1M blended at a 3:1 input-to-output ratio), with cached input at $0.2 per 1M tokens.

What is the context window of Grok 4.3?

Grok 4.3 has a 1.000.000-token context window (1M).

Is Grok 4.3 deprecated?

No — Grok 4.3 is generally available (GA) and not currently scheduled for deprecation or retirement in our tracker.

Does Grok 4.3 support image or vision input?

Yes — Grok 4.3 accepts image input. Listed modalities: text-in, image-in, text-out.

Can I self-host Grok 4.3?

No — Grok 4.3 is proprietary. Its weights are not publicly released, so it is available only through xAI's API (or hosted partners), not for self-hosting.

What is the API model string for Grok 4.3?

The API model identifier for Grok 4.3 is "grok-4.3" when calling xAI's API.