Identity
- Status
- active
- Developer ID
grok-4.5- Released
- Jul 16, 2026
- Version
- Grok 4.5
- License
- Unknown
xAIGrok 4.5
Grok 4.5 is xAI's prior flagship model for coding, agentic tasks, and professional knowledge work.
- Token context
- 500K tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- Jul 16, 2026
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
XaiAvailable | $2.00 | $6.00 | $0.30 | — | Sep 3, 2026 | Provider-reported |
Benchmarks
All benchmark results →| ARC-AGI-1verified-v1-2aa739d957fc | 87.17 | — | — | Grok 4.5 (Medium)unknown | Original sourcewinner eligible | Third-party benchmark |
| ARC-AGI-2verified-v2-b5cb5ec6e8c7 | 52.64 | — | — | Grok 4.5 (Medium)unknown | Original sourcewinner eligible | Third-party benchmark |
| LiveBench2026-06-25 | 80.01 | 10,517 | 1,270 | grok-4.5average per case | Recomputedwinner eligible | Third-party benchmark |
| LMArena Agent Arenaagent-2026-08-31-011508720696 | 6.06 | — | 34,008 | Grok 4.5; 95% CI [4.91016619, 7.21148996]; sessions 34008; observations 1655564; rank 13unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Document Arenadocument-2026-07-30-011508720696 | 1,453.73 | — | 2,435 | grok-4.5; 95% CI [1441.93744334, 1465.52785378]; votes 2435; rank 20unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Search Arenasearch-2026-08-24-011508720696 | 1,212.65 | — | 31,505 | grok-4.5; 95% CI [1205.78347274, 1219.50889748]; votes 31505; rank 8unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-09-01-011508720696 | 1,451.82 | — | 25,873 | grok-4.5; 95% CI [1446.90989155, 1456.73122428]; votes 25873; rank 39unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-08-27-011508720696 | 1,291.11 | — | 6,401 | grok-4.5; 95% CI [1282.25469345, 1299.96666150]; votes 6401; rank 22unknown | Original sourcewinner eligible | Third-party benchmark |
| ToneBench2026-08-28-10-task-cd9819ab6e4d | 82.23 | 2,688 | 50 | Grok 4.5average per case | Original sourcewinner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 500K tokens
- Maximum output
- Unknown
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Not reported
Interface and Access
- Inputs
- Text, Image
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- Yes
- Tool calling
- Yes
- Capabilities
- chat, generation, reasoning, structured outputs, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesgrok-4.5
Explicit Unknowns
- Maximum output
- Architecture
- Tokenizer
- Knowledge cutoff
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Grok 4.5xAI | vs |  GPT-5.6 SolOpenAI | cross-developer peersimage, text |
Grok 4.5xAI | vs | Claude Fable 5.1Anthropic | cross-developer peersimage, text |
Grok 4.5xAI | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Grok 4.5xAI | vs |  DeepSeek V4 ProDeepSeek | cross-developer peerstext |
Grok 4.5xAI | vs | Grok 4.6xAI | family variantsimage, text |
Grok 4.5xAI | vs |  Qwen3.8 MaxQwen | cross-developer peersimage, text |
Grok 4.5xAI | vs |  Kimi K3Moonshot AI | cross-developer peersimage, text |
Grok 4.5xAI | vs |  MiniMax M3MiniMax | cross-developer peersimage, text |
Grok 4.5xAI | vs |  GLM 5.3Z.ai | cross-developer peerstext |
Grok 4.5xAI | vs |  Hy4 previewTencent | cross-developer peerstext |
Grok 4.5xAI | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Grok 4.5xAI | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Grok 4.5xAI | vs | cross-developer peersimage, text | |
Grok 4.5xAI | vs |  Nova 2 LiteAmazon | cross-developer peersimage, text |
Grok 4.5xAI | vs | cross-developer peersimage, text | |
Grok 4.5xAI | vs |  ERNIE 5.1Baidu | cross-developer peerstext |
Grok 4.5xAI | vs | cross-developer peerstext | |
Grok 4.5xAI | vs | cross-developer peerstext | |
Grok 4.5xAI | vs |  Phi-4 ReasoningMicrosoft | cross-developer peerstext |
Grok 4.5xAI | vs | cross-developer peerstext | |
Grok 4.5xAI | vs |  Sonar ProPerplexity | cross-developer peerstext |
Grok 4.5xAI | vs | family variantsimage, text |
Questions
Grok 4.5 FAQs
What is Grok 4.5?+
Grok 4.5 is xAI's prior flagship model for coding, agentic tasks, and professional knowledge work. It is developed by xAI and its current sourced lifecycle status is active.
What inputs and outputs does Grok 4.5 support?+
Grok 4.5's current record lists Text and Image as input and Text as output.
How much context does Grok 4.5 support?+
The current record lists a 500K-token context window and does not report a maximum output length.
Is Grok 4.5 available through an API?+
Grok 4.5 is marked as API-available. The directly sourced provider records currently include Xai.
How much does Grok 4.5 cost through an API?+
The lowest directly sourced prices currently attached to Grok 4.5 are $2.00 per million input tokens through Xai and $6.00 per million output tokens through Xai. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does Grok 4.5 support?+
Grok 4.5's recorded capabilities are chat, generation, reasoning, structured outputs, and tools. Its supported tasks are image, reasoning, and text.
Can Grok 4.5 be self-hosted?+
Grok 4.5 is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does Grok 4.5 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are grok-4.5.
Which models can Grok 4.5 be compared with?+
The current compatible peer set includes GPT-5.6 Sol, Claude Fable 5.1, Gemini 3.1 Pro, DeepSeek V4 Pro, and Grok 4.6. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for Grok 4.5?+
Grok 4.5 was last verified Sep 3, 2026 from xAI's primary source, “Grok 4.5 | SpaceXAI Docs.” The evidence is classified as official fact.