Grok 4.5

Name: Grok 4.5
Author: xAI

xAI

Released Jul 08, 2026Updated 14 Nov 2026, 18:34 UTC

Context window: 500K
Input / Output: image, text → text

API pricing

USD / 1M tokens

Input length	Input	Output	Cached input
Input ≤ 199,999 tokens	$2.00	$6.00	$0.30
Input > 199,999 tokens	$4.00	$12.00	$0.60

Thresholds include all input tokens, including cache hits.

Calculate your workload

Evidence links

Input: $2.00Input ≤ 199,999 tokens
$4.00Input > 199,999 tokens
Output: $6.00Input ≤ 199,999 tokens
$12.00Input > 199,999 tokens
Cached input: $0.30Input ≤ 199,999 tokens
$0.60Input > 199,999 tokens

Timeline

2026-07-08 · API availability · evidence link
2026-07-16 · Product update · evidence link
2026-07-22 · Product update · evidence link
2026-07-28 · Product update · evidence link
2026-07-17 · API availability (EU) · evidence link

Input / output price · USD / 1M tokens

Model	Evidence links	Input / output price
`grok-4.5` batch	xai API route unavailable	$1.60 (Input ≤ 199,999 tokens); $3.20 (Input > 199,999 tokens) / $4.80 (Input ≤ 199,999 tokens); $9.60 (Input > 199,999 tokens)
`grok-4.5` standard	xai	$2.00 (Input ≤ 199,999 tokens); $4.00 (Input > 199,999 tokens) / $6.00 (Input ≤ 199,999 tokens); $12.00 (Input > 199,999 tokens)

2026-11-13T17:33:04.604Z · Evidence links · xAI · official articles
Excerpt
Grok 4.5 is available today in Grok Build, in Cursor on all plans, and from the SpaceXSI console
2026-11-13T17:33:04.604Z · Evidence links · xAI · official articles
Excerpt
Grok 4.5, our most intelligent model yet, is now on grok.com, X, iOS, and Android
2026-11-13T17:22:38.399Z · Evidence links · xAI · official articles
Excerpt
Grok 4.5, our smartest coding model, is now available in GitHub Copilot
2026-11-13T17:16:57.056Z · Confirmed use · xAI · official articles · Introducing Grok 4.6
2026-11-05T17:47:58.156Z · Catalogue listing · GitHub · xai-org/grok-build · code
Excerpt
": "Balanced effort with standard implementation and testing" }, { "value": "low", "label": "Low Effort", "description": "Quick, fast implementations" } ] }, { "id": "grok-4.5", "model": "grok-4.5", "model_family": "xai", "name": "Grok 4.5", "context_window": 500000, "api_backend": "responses", "supports_backend_search": false, "system_prompt_label": "Grok 4.5", "supports_reasoning_effort": true, "reasoning_effort": "high", "auto_compact_threshold_percent": 80, "compaction_at_tokens": true, "compactions_remaining": 1, "reasoning_efforts": [ { "value": "high", "label": "High Effort", "description": "Highest implementation quality with extensive reasoning", "default": true }
2026-10-07T19:38:07.564Z · Evidence links · xAI · release notes
Excerpt
Grok 4.5 is now available in the API console for EU users
2026-08-12T17:29:54.148Z · Alex's posts · Alex Getman
Excerpt
⚡️ Grok 4.6 is out It’s a solid jump over Grok 4.5 in agents, coding and long project work. On Artificial Analysis, it’s already matching GPT 5.6 Sol. API pricing is $2 input and $6 output, versus $5 and $30 for Sol.
2026-07-15T21:37:21.344Z · Alex's posts · Alex Getman
Excerpt
Elon Musk open-sourced Grok Build The terminal agent stack is now open source: file reading, context gathering, command execution, plugins, and subagents. The Grok 4.5 weights are not included, the model itself is still closed. Now anyone can see how Grok works with code, fork the agent, and plug in a local model. xAI basically handed the community a build-your-own Claude Code kit.
2026-07-10T16:34:15.332Z · Alex's posts · Alex Getman
Excerpt
Grok 4.5: a new competitor to GPT and Claude Posting this a little late, but I prepared something interesting. Grok 4.5 is temporarily available to test for free in Grok Build and Cursor. The model runs at around 80 tokens per second, supports a context window of up to 500,000 tokens, and costs $2 per million input tokens and $6 per million output tokens. According to Musk, Grok 4.5 was trained from scratch on SpaceXAI’s own foundation and is not built on top of Kimi like Composer. In terms of quality, Grok 4.5 comes close to GPT-5.6 Terra, while its pricing is closer to Luna. Among Anthropic models, it sits between Haiku and Sonnet, making it especially attractive in terms of price-to-pe

Alex's take

Alex · 10 Jul“Grok 4.5: a new competitor to GPT and Claude Posting this a little late, but I prepared something interesting. Grok 4.5 is temporarily available to test for free in Grok Build and Cursor. The model runs at around 80…”

Signals 2

22:3513 Sep

xAISighting

qwen3.8-27b

Supported7 evidence links

21:3911 Sep

xAISighting

Grok 4.5 is a model from xAI, released on 8 Jul 2026. The context window is 500,000 tokens. Pricing is $2.00 (Input ≤ 199,999 tokens); $4.00 (Input > 199,999 tokens) per million input tokens and $6.00 (Input ≤ 199,999 tokens); $12.00 (Input > 199,999 tokens) per million output tokens.

Context window: 500,000
Input: image · text
Output: text
Input · USD / 1M tokens: $2.00 (Input ≤ 199,999 tokens); $4.00 (Input > 199,999 tokens)
Output · USD / 1M tokens: $6.00 (Input ≤ 199,999 tokens); $12.00 (Input > 199,999 tokens)
Cached input · USD / 1M tokens: $0.30 (Input ≤ 199,999 tokens); $0.60 (Input > 199,999 tokens)

Questions

What is the context window of Grok 4.5?

The context window is 500,000 tokens.

How much does Grok 4.5 cost?

Pricing is $2.00 (Input ≤ 199,999 tokens); $4.00 (Input > 199,999 tokens) per million input tokens and $6.00 (Input ≤ 199,999 tokens); $12.00 (Input > 199,999 tokens) per million output tokens. Cached input is $0.30 (Input ≤ 199,999 tokens); $0.60 (Input > 199,999 tokens) per million.

When was Grok 4.5 released?

On 8 Jul 2026.