xAI: Grok 4.5
Analysis Summary
Grok 4.5 is xAI's flagship model and one of the strongest benchmarked models in the field, with an intelligence index of 53.8 and a coding index of 72.4. Its GPQA score of 0.931 and HLE of 0.403 confirm frontier-level reasoning across science, mathematics, and complex inference tasks.
For businesses, Grok 4.5 suits the most demanding workloads: autonomous coding agents, complex multi-step reasoning, long-document analysis, and multimodal pipelines. Vision, tool use, and function calling are all supported, and the 500K token context window handles large codebases and extended documents. The main practical consideration is that it lacks an agentic index score in the data, though its coding and reasoning strength make it highly capable for agentic use.
At $2.00 input and $6.00 output per million tokens, it is priced aggressively for a frontier model, offering strong value relative to comparably capable alternatives. Teams prioritising raw reasoning and coding power at a reasonable cost should consider it a primary option.
Assessed July 10, 2026
Editorial notes
Grok 4.5 from xAI delivers world-class reasoning and coding, with vision, tool use, function calling, and a 500K token context at competitive pricing for a frontier-tier model.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How xAI: Grok 4.5 compares
XAI: Grok 4.5 ranks #6 of 392 AI models we track for overall intelligence, #7 of 161 for coding. Its 500K-token context window is larger than 84% of the models we list. At $2.00 per million input tokens it is cheaper than 18% of comparable models.
About xAI: Grok 4.5
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Capabilities
Performance Indices
Source: Artificial Analysis
This model was released recently. Independent benchmark evaluations are typically completed within days of release, so these figures are preliminary and are likely to be updated as testing is finalised.
Benchmark Scores
Intelligence
Content
Benchmark data from Artificial Analysis and Hugging Face
How does xAI: Grok 4.5 stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
x-ai/grok-4.5
|
| Provider | x-ai |
| Release Date | July 8, 2026 |
| Context Length | 500,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $2.00 | $0.002000 |
| Output | $6.00 | $0.006000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about xAI: Grok 4.5
How much does xAI: Grok 4.5 cost?
xAI: Grok 4.5 costs $2.00 per million input tokens and $6.00 per million output tokens.
What is the context window of xAI: Grok 4.5?
xAI: Grok 4.5 has a context window of 500,000 tokens (500K).
Is xAI: Grok 4.5 good for coding?
On our coding benchmark index, xAI: Grok 4.5 ranks #7 of 161 models, placing it in the top quartile of the field for code generation and debugging.
What can xAI: Grok 4.5 do?
xAI: Grok 4.5 supports image/vision input, tool use, and function calling.
Who created xAI: Grok 4.5?
xAI: Grok 4.5 is developed by xAI and was released on July 8, 2026.
