Identity
- Status
- active
- Developer ID
grok-4.3- Released
- Jun 17, 2026
- Version
- Grok 4.3
- License
- Unknown
xAIGrok 4.3
Grok 4.3 is an xAI frontier model for enterprise agents with configurable reasoning and a one-million-token context window.
- Token context
- 1,000K tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- Jun 17, 2026
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
XaiAvailable | $1.25 | $2.50 | $0.20 | — | Sep 3, 2026 | Provider-reported |
Benchmarks
All benchmark results →| LiveBench2026-06-25-90f8d44da965 | 69.27 | 11,184 | 1,270 | grok-4.3average per case | Recomputedwinner eligible | Third-party benchmark |
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e | 1,165.81 | — | 128,393 | grok-4.3; 95% CI [1161.07351221, 1170.53848666]; votes 128393; rank 30unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,396.92 | — | 71,347 | grok-4.3; 95% CI [1393.31445966, 1400.53298228]; votes 71347; rank 158unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e | 1,229.24 | — | 27,037 | grok-4.3; 95% CI [1223.34663531, 1235.13960477]; votes 27037; rank 78unknown | Original sourcewinner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 65.80 | 7,563 | 50 | Grok 4.3 (high)average per case | Original sourcenot winner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 62.45 | 1,836 | 50 | Grok 4.3 (low)average per case | Original sourcenot winner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 1,000K 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-4.3, grok-4.3-latest
Explicit Unknowns
- Maximum output
- Architecture
- Tokenizer
- Knowledge cutoff
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Grok 4.3xAI | vs | Grok 4.6xAI | family variantsimage, text |
Grok 4.3xAI | vs | Claude Mythos 5.1Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | Claude Sonnet 5Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | family variantsimage, text | |
Grok 4.3xAI | vs | Claude Opus 4.6Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | Claude Opus 4.7Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | Claude Opus 4.8Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | Claude Opus 5Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs | Claude Sonnet 4.6Anthropic | cross-developer peersimage, text |
Grok 4.3xAI | vs |  GPT-5.4OpenAI | cross-developer peersimage, text |
Grok 4.3xAI | vs | family variantsimage, text | |
Grok 4.3xAI | vs | Grok 4.5xAI | family variantsimage, text |
Questions
Grok 4.3 FAQs
What is Grok 4.3?+
Grok 4.3 is an xAI frontier model for enterprise agents with configurable reasoning and a one-million-token context window. It is developed by xAI and its current sourced lifecycle status is active.
What inputs and outputs does Grok 4.3 support?+
Grok 4.3's current record lists Text and Image as input and Text as output.
How much context does Grok 4.3 support?+
The current record lists a 1,000K-token context window and does not report a maximum output length.
Is Grok 4.3 available through an API?+
Grok 4.3 is marked as API-available. The directly sourced provider records currently include Xai.
How much does Grok 4.3 cost through an API?+
The lowest directly sourced prices currently attached to Grok 4.3 are $1.25 per million input tokens through Xai and $2.50 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 4.3 support?+
Grok 4.3's recorded capabilities are chat, generation, reasoning, structured outputs, and tools. Its supported tasks are image, reasoning, and text.
Can Grok 4.3 be self-hosted?+
Grok 4.3 is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does Grok 4.3 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are grok-4.3 and grok-4.3-latest.
Which models can Grok 4.3 be compared with?+
The current compatible peer set includes Grok 4.6, Claude Mythos 5.1, Claude Sonnet 5, Grok Build 0.1, and Claude Opus 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 4.3?+
Grok 4.3 was last verified Sep 3, 2026 from xAI's primary source, “Grok 4.3 | SpaceXAI Docs.” The evidence is classified as official fact.