xAI · Released Jul 8, 2026Grok 4.5
xAI's Grok model for chat, coding, agentic tools, and lower hallucination risk.
- Capability
- 154.0ECI · #36 of 148
- Input
- $2.00per 1M tokens
- Output
- $6.00per 1M tokens
- Context
- 500K500K max output
What it costs
- Input
- $2.00per million tokens
- Output
- $6.00per million tokens
- Cached input
- $0.30per million tokens
- Over 200K tokens
- $4.00 / $12.00input / output per million
- Blended (3:1)
- $3.00pricier than 74% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $7.00 |
| Team assistant25M input + 5M output tokens | $80.00 |
| Production app250M input + 50M output tokens | $800.00 |
Official xAI API price, as listed on models.dev.
Independent benchmarks
#36 of 148 scored models
The shaded band is Epoch AI’s confidence range (152.3–156.1); the tick marks the median scored model.
Scores from Epoch AI, run independently of xAI.
The details
- Lab
- xAI
- Released
- Jul 8, 2026
- Context window
- 500,000 tokens
- Max output
- 500,000 tokens
- Inputs
- Text, Images
- Output
- Text
- Reasoning
- Adjustable effort low · medium · high
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
grok-4.5on xAI- Availability
- 24 API providerslisted on models.dev
What xAI claims
Published by the lab at launch. Settings vary, so compare these only with care.
More from xAI
About Grok 4.5
How much does Grok 4.5 cost?
Grok 4.5 costs $2.00 input / $6.00 output per million tokens (official xAI API price). Cached input is $0.30 per million tokens. Requests over 200K tokens are billed at $4.00 input / $12.00 output. At a 3:1 input-to-output mix that is $3.00 per million tokens, more expensive than 74% of the 360 priced models we track.
What is the context window of Grok 4.5?
Grok 4.5 accepts up to 500,000 tokens per request and can write up to 500,000 tokens in one response.
How good is Grok 4.5?
Epoch AI gives Grok 4.5 a Capabilities Index score of 154.0 (likely range 152.3–156.1), ranking it #36 of 148 models Epoch has scored. Epoch AI benchmark results: GPQA Diamond 93.4%, FrontierMath Tiers 1–3 57.2%, OTIS Mock AIME 2024–2025 97.8%, SimpleQA Verified 48.3%.
Is Grok 4.5 open source?
No. Grok 4.5 is proprietary; you use it through xAI’s API or partner platforms.
What inputs does Grok 4.5 support?
Grok 4.5 accepts text and images and replies in text. It is a reasoning model with low, medium and high effort settings, supports tool calling and can return structured JSON output.
When was Grok 4.5 released?
xAI released Grok 4.5 on Jul 8, 2026.
What are the best alternatives to Grok 4.5?
The closest current models from other labs on capability, price and release date are Gemini 3.5 Flash (Google, ECI 154.5, $1.50 / $9.00), Qwen3.8 Max 0902 (Alibaba (Qwen), ECI 155.2, $2.00 / $6.00), Muse Spark 1.1 (Meta, ECI 154.3, $1.25 / $4.25) and Claude Sonnet 5 (Anthropic, ECI 156.3, $2.00 / $10.00).