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Models / xAI

Grok 4.5

GA

New flagship launched 2026-07-08 (public access 2026-07-09); xAI's smartest model for chat, coding, agentic and knowledge work per docs.x.ai. Aliases: grok-4.5-latest, grok-build-latest. Modality 'text, image -> text' (vision) per official model page. Cached input $0.30/M per the official model page (2026-07-22); it read $0.50/M on 2026-07-12, so this may be a cached-tier reduction, but the change is not independently timestamped by xAI and is recorded here as a value correction, not a changelog price-change event. TIERED pricing: figures shown are the base tier for prompts <=200K tokens; prompts >200K are billed 2x ($4/M input, $0.60/M cached, $12/M output). 500K context window (smaller than Grok 4.3's 1M). Max output tokens and knowledge cutoff not published on the docs page.

Grok 4.5 by xAI costs $2 per 1M input tokens and $6 per 1M output tokens ($3/1M blended), with a 500K (500.000-token) context window. It is generally available (GA).

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

Provider
xAI
Status
GA
Input price
$2 / 1M tokens
Output price
$6 / 1M tokens
Cached input
$0.3 / 1M tokens
Blended price
$3 / 1M tokens
Context window
500.000 tokens (500K)
Max output
—
Modality
text-in, image-in, text-out
Open weights
No — API only
Knowledge cutoff
—
Released
8 Jul 2026
API string
grok-4.5

Source: xAI official documentation ↗

See also

Compare Grok 4.5 head-to-head

Grok 4.5 vs Claude Opus 4.8→

$3 vs $10 blended /M · cross-provider

Grok 4.5 vs GPT-5.6 Sol→

$3 vs $11.25 blended /M · cross-provider

Grok 4.5 vs Gemini 3.6 Flash→

$3 vs $3 blended /M · cross-provider

Grok 4.5 vs Mistral Large 3→

$3 vs $0.75 blended /M · cross-provider

Grok 4.5 vs Amazon Nova Pro→

$3 vs $1.40 blended /M · cross-provider

Grok 4.5 vs Qwen-Max (Qwen2.5-Max)→

$3 vs $2.80 blended /M · cross-provider

FAQ

Grok 4.5 — questions & answers

How much does Grok 4.5 cost?

Grok 4.5 is priced at $2 per 1M input tokens and $6 per 1M output tokens ($3/1M blended at a 3:1 input-to-output ratio), with cached input at $0.3 per 1M tokens.

What is the context window of Grok 4.5?

Grok 4.5 has a 500.000-token context window (500K).

Is Grok 4.5 deprecated?

No — Grok 4.5 is generally available (GA) and not currently scheduled for deprecation or retirement in our tracker.

Does Grok 4.5 support image or vision input?

Yes — Grok 4.5 accepts image input. Listed modalities: text-in, image-in, text-out.

Can I self-host Grok 4.5?

No — Grok 4.5 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 4.5?

The API model identifier for Grok 4.5 is "grok-4.5" when calling xAI's API.