xAI has 3 models in The AI Leaderboard directory: Grok 4.6, Grok 4.5, Grok 4.3. This provider hub compares their verified availability, licensing, context windows, pricing references and intended uses, with direct links to every model guide.
Quick answer: Grok 4.6 is the first xAI model to evaluate for its documented fit: Cost-sensitive agents, coding and partner workflows. Use the lineup table below to compare it with the provider’s other current, specialist, open-weight or migration-reference models.
xAI model lineup at a glance
Metric | Current directory value |
|---|---|
Models covered | 3 |
Currently ranked | None in the current top eight |
Open-weight models | 0 |
Restricted models | 0 |
Legacy or migration references | 0 |
Highest-ranked model | No current Overall rank assigned |
Last verified | September 2, 2026 |
Complete xAI model directory
Model names in this table link directly to their complete guides. Status and pricing can change, so confirm the active endpoint and provider terms before procurement or migration.
Model | Status | License | Context | Best fit |
|---|---|---|---|---|
Available | Proprietary | 1 million tokens | cost-efficient reasoning, tool calling and large-context applications | |
Available | Proprietary | 500,000 tokens | coding, office automation, technical research and tool-using agents | |
Available; outside current top eight | Proprietary | 500K tokens | Cost-sensitive agents, coding and partner workflows |
How the xAI models differ
Model | Directory role | Modalities | Maximum output | Access |
|---|---|---|---|---|
Grok 4.3 | Available proprietary | Text and image input; text output | No separate maximum published on the model card | xAI API, Amazon Bedrock and selected integrations |
Grok 4.5 | Available proprietary | Text and image input; text output | No separate maximum published on the model card | xAI API, Grok Build, Cursor, Grok apps and selected partners |
Grok 4.6 | Available proprietary | Text and image input; text output | No published output limit | See the guide for current access routes |
The labels above describe access and lifecycle, not a hidden capability ranking. Only models with a validated Overall record receive a rank on this site. Other guides remain unranked until comparable evidence is available.
xAI model pricing
Model | Pricing reference | Cost caveat |
|---|---|---|
Grok 4.3 | $1.25 input and $2.50 output per million tokens | Caching, tools, long context and regional rates may differ |
Grok 4.5 | $2 input, $0.30 cached input and $6 output per million tokens below 200K prompt tokens; higher long-context rates apply | Caching, tools, long context and regional rates may differ |
Grok 4.6 | $2 input / $6 output per million tokens | Caching, tools, long context and regional rates may differ |
Token price is not cost per accepted result. Measure retries, tool calls, latency, infrastructure and reviewer time on the same task set.
Which xAI model should you choose?
Requirement | Starting point | Why |
|---|---|---|
Highest current rank | Grok 4.3 | No ranked model; start with the documented fit and test directly |
Open weights or self-hosting | No open-weight model in this provider directory | Compare open-weight models in the broader directory |
Restricted specialist work | No restricted model in this provider directory | Use generally available models and least-privilege controls |
Migration or reproduction | Grok 4.6 | Compare current versions using pinned snapshots |
Lowest operational cost | Measure two or three eligible models | Headline token prices omit retries, tools, caching and human review |
xAI models, explained
Grok 4.3
Grok 4.3 was released 2026. It is listed as available with proprietary. The documented context window is 1 million tokens, and the maximum output is No separate maximum published on the model card.
- Best fit: cost-efficient reasoning, tool calling and large-context applications.
- Modalities: Text and image input; text output.
- Access: xAI API, Amazon Bedrock and selected integrations.
- Pricing reference: $1.25 input and $2.50 output per million tokens.
Read the complete Grok 4.3 guide for benchmarks, limitations, official sources and an evaluation framework.
Grok 4.5
Grok 4.5 was released July 16, 2026. It is listed as available with proprietary. The documented context window is 500,000 tokens, and the maximum output is No separate maximum published on the model card.
- Best fit: coding, office automation, technical research and tool-using agents.
- Modalities: Text and image input; text output.
- Access: xAI API, Grok Build, Cursor, Grok apps and selected partners.
- Pricing reference: $2 input, $0.30 cached input and $6 output per million tokens below 200K prompt tokens; higher long-context rates apply.
Read the complete Grok 4.5 guide for benchmarks, limitations, official sources and an evaluation framework.
Grok 4.6
Grok 4.6 was released August 12, 2026. It is listed as available; outside current top eight with proprietary. The documented context window is 500K tokens, and the maximum output is No published output limit.
- Best fit: Cost-sensitive agents, coding and partner workflows.
- Modalities: Text and image input; text output.
- Access: See the guide for current access routes.
- Pricing reference: $2 input / $6 output per million tokens.
Read the complete Grok 4.6 guide for benchmarks, limitations, official sources and an evaluation framework.
How to evaluate xAI models
Shortlist the xAI models that meet your access, licensing and modality requirements. Freeze 20 to 50 representative tasks, then give each candidate the same prompts, tools, context, reasoning budget and retry limits. Record the exact model identifier because provider aliases can change.
Measure | Record | Decision use |
|---|---|---|
Task completion | Pass rate and rubric score | Establish whether the model meets the acceptance threshold |
Reliability | Repeated-run variance and recovery behavior | Avoid choosing from one lucky result |
Quality | Factuality, instruction following and reviewer acceptance | Separate polished output from correct output |
Tool use | Wrong calls, retries, permission errors and unsafe actions | Evaluate the model and agent harness together |
Efficiency | Wall time, tokens, caching, tools and review labor | Calculate cost per accepted result |
Governance | Retention, training, regional processing and audit logs | Confirm the deployment fits policy requirements |
Availability, versions and lifecycle
xAI may expose different snapshots, effort settings, products and partner integrations under similar labels. Treat every model name as incomplete without an exact endpoint or checkpoint. Re-run regression tests after any model, system prompt, retrieval, tool or permission change.
- Available means a documented access route exists, not that every region or account has access.
- Preview models can change behavior, price or retirement dates before general availability.
- Open weights require an exact license and checkpoint review; “open” does not guarantee open training data or low operating cost.
- Restricted models require separate eligibility, safeguards and data-handling review.
- Legacy models remain useful for migration and reproduction but should not be the default for a new deployment.
Sources and update policy
Official xAI model documentation is the provider-level starting point. Each linked model guide cites its own first-party launch page, model card, pricing reference and safety documentation.
Compare this provider with the complete Best AI Models directory.
Last verified September 2, 2026. The hub should be updated when the provider launches, retires, renames or reprices a model, changes context or output limits, alters licensing, or modifies regional availability.
Frequently asked questions
How many xAI models are covered?
This hub covers 3: Grok 4.6, Grok 4.5, Grok 4.3. Every model has a dedicated guide linked from the directory table and profile sections.
What is the best xAI model?
xAI does not have a model with a current Overall rank on this page. Start with Grok 4.6 for its documented fit, then validate it against alternatives using the same task set.
Does xAI offer open weights?
No open-weight xAI model is included in the current directory. The listed models use provider-controlled access routes.
How current is the pricing?
Pricing references were verified September 2, 2026 from first-party documentation summarized in each model guide. Always recheck the provider before budgeting because cache, batch, long-context, tool and regional rates can change.
Should every xAI model be tested?
No. Remove models that fail access, license, modality, context, latency or governance requirements first. Test the smallest credible shortlist on representative work.