Grok 4.5 benchmarks, pricing and specs
Grok 4.5 is a xAI model released on July 16, 2026 that takes text and image input and produces text. It costs $2 per 1M input tokens and $6 per 1M output tokens and accepts up to 500,000 tokens of context. It scores 1466 Elo on Arena Text, #23 of 39 current models (Arena, measured October 8, 2026).
- Per 1M input tokens
- $2
- Per 1M output tokens
- $6
- Context window
- 500K
- Arena Text
- 1466 Elo · #23/39
Data verified October 12, 2026 · Dataset 2026-10-12
Key facts
- Provider
- xAI
- Model family
- Grok 4
- Release date
- July 16, 2026
- Status
- Current
- Access
- API only
- API model id
- Not reported
- Context window
- 500,000 tokens
- Max output
- Not reported
- Input
- text, image
- Output
- text
- Task families
- text, multimodal
- Declared capabilities
- reasoning
Grok 4.5 pricing
It is the #12 most expensive of 37 current text models priced per 1M input tokens.
Independent benchmark results
Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. xAI's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.
| Benchmark | Score | Rank | Measured | Source |
|---|---|---|---|---|
| Arena Text | 1466 Elo | #23 of 39 | October 8, 2026 | Arena · 2026-10-12 |
| GPQA Diamond | 93.4% | #12 of 37 | October 12, 2026 | Epoch AI · 2026-10-12 |
| FrontierMath Tiers 1-3 (v2) | 57.2% | #28 of 37 | October 12, 2026 | Epoch AI · 2026-10-12 |
| SimpleQA Verified | 48.3% | #20 of 34 | October 12, 2026 | Epoch AI · 2026-10-12 |
Strengths, cautions and best uses
Strengths
- Grok 4.5 is positioned for coding, agentic tasks, and knowledge work with a 500,000-token context window
- xAI says it is served at about 80 tokens per second and solves tasks in under half the steps, at $2 input and $6 output per 1M tokens
Cautions
- The published base rates increase for requests at or above the provider long-context threshold
Best for
- Coding and agentic API evaluations below the long-context pricing threshold
Alternatives to Grok 4.5
The closest current textmodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.
Cheaper, same or higher score
DeepSeek-V4.1-Flash
- 85% cheaper per 1M input tokens, $0.30 vs $2
- 9 points higher on Arena Text, 1475 vs 1466
- 1M context window vs 500K
- From DeepSeek
Claude Sonnet 5
- Same price per 1M input tokens, $2
- 5 points lower on Arena Text, 1461 vs 1466
- 1M context window vs 500K
- From Anthropic
Claude Sonnet 5.5
- Same price per 1M input tokens, $2
- 10 points higher on Arena Text, 1476 vs 1466
- 1M context window vs 500K
- From Anthropic
GPT-4.1
- Same price per 1M input tokens, $2
- 51 points lower on Arena Text, 1415 vs 1466
- 1.05M context window vs 500K
- From OpenAI
Compare Grok 4.5 with
Articles about Grok 4.5
Other Grok 4 models
Grok 4.5 FAQ
How much does Grok 4.5 cost?
Grok 4.5 costs $2 per 1M input tokens and $6 per 1M output tokens at the standard tier. It is the #12 most expensive of 37 current text models priced per 1M input tokens. Source: SpaceXAI, verified August 7, 2026.
What is the context window of Grok 4.5?
Grok 4.5 accepts up to 500,000 tokens of context. That ranks #37 of 44 current text models by context length.
How does Grok 4.5 score on independent benchmarks?
Grok 4.5 scores 1466 Elo on Arena Text, #23 of 39 current models (Arena, measured October 8, 2026), 93.4% on GPQA Diamond, #12 of 37 current models (Epoch AI, measured October 12, 2026) and 57.2% on FrontierMath Tiers 1-3 (v2), #28 of 37 current models (Epoch AI, measured October 12, 2026). These are independent evaluations, not xAI's own launch figures.
Is Grok 4.5 open source or API only?
Grok 4.5 is available through xAI's API only; its weights are not published.
What are the best alternatives to Grok 4.5?
The closest current alternatives by price and measured performance are DeepSeek-V4.1-Flash (85% cheaper per 1M input tokens, $0.30 vs $2), Claude Sonnet 5 (same price per 1M input tokens, $2), Claude Sonnet 5.5 (same price per 1M input tokens, $2) and GPT-4.1 (same price per 1M input tokens, $2).
Sources
- Introducing Grok 4.5 · SpaceXAI · official · verified August 7, 2026
- Grok 4.5 model · SpaceXAI · official · verified August 7, 2026
- Epoch AI Benchmarking Hub data (benchmark_data.zip) · Epoch AI · independent · verified October 12, 2026 · CC-BY-4.0
- Arena leaderboard dataset (lmarena-ai/leaderboard-dataset) · Arena · independent · verified October 12, 2026 · CC-BY-4.0
Cite this page
Van Data Team. "Grok 4.5 Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/grok-4-5
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Production evaluation
Deciding whether Grok 4.5 fits your workload?
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