| Provider | xAI |
|---|---|
| Model ID | x-ai/grok-4.3 |
| Prompt Price per 1M tokens | $1.25 |
| Completion Price per 1M tokens | $2.5 |
| Sample Workload Cost 1M input + 500K output | $2.5 |
| Context Window | 1M |
| Release Date | |
| Popularity | #53 |
| Popularity Signal | 11.3B tokens |
Grok 4.3
xAI API model specs with normalized input price, output price, context window, sample workload cost, and related comparisons.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget brief
Grok 4.3 is estimated at $2.5 for the standard workload.
Grok 4.3 is best suited for long-context workloads. A 1M input token plus 500K output token workload is estimated at $2.5.
Input price$1.25per 1M tokens
Output price$2.5per 1M tokens
Context window1Mreported maximum
Popularity#5311.3B tokens signal volume
Use this as a first-pass planning estimate, then verify provider limits, routing, discounts, and availability before production deployment.
Estimate your workload cost
Estimate this model for your workload
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Alternative path
Alternative Shortlist
Use these rows to build a test shortlist around Grok 4.3. Lower cost, same-provider fit, and larger context are separate decisions, so each group is ranked by a different signal.
Lower-cost alternatives
Cross-provider candidates with a lower standard 1M input plus 500K output estimate.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| 🔥Owl Alpha | OpenRouter | $0 | 1.05M | Lower standard workload estimate from another provider. | Open model Compare |
| New🔥Nemotron 3 Ultra (free) | NVIDIA | $0 | 1M | Lower standard workload estimate from another provider. | Open model Compare |
| 🔥Laguna M.1 (free) | Poolside | $0 | 262.14K | Lower standard workload estimate from another provider. | Open model Compare |
| Nemotron 3 Super (free) | NVIDIA | $0 | 1M | Lower standard workload estimate from another provider. | Open model Compare |
Same-provider swaps
Lower-cost options from the same provider, useful when account setup or procurement is already fixed.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| Grok Build 0.1 | xAI | $2 | 256K | Same provider with a lower standard workload estimate. | Open model Compare |
Larger-context upgrades near this budget
Models with more context that stay within a close sample-cost band when price data is available.
| Model | Provider | Sample Cost | Context | Why it is here | Next Step |
|---|---|---|---|---|---|
| Llama 4 Scout | Meta | $0.25 | 10M | More context while staying near this model's sample-cost band. | Open model Compare |
| Grok 4.20 | xAI | $2.5 | 2M | More context while staying near this model's sample-cost band. | Open model Compare |
| Grok 4.20 Multi-Agent | xAI | $2.5 | 2M | More context while staying near this model's sample-cost band. | Open model Compare |
| 🔥Owl Alpha | OpenRouter | $0 | 1.05M | More context while staying near this model's sample-cost band. | Open model Compare |
Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Grok 4.3 is best suited for long-context workloads.
A 1M input token plus 500K output token workload is estimated at $2.5.
Decision Shortcuts
Compare this model
Search head-to-head pages that include Grok 4.3 and review input price, output price, context, and sample workload cost.
Find comparisonsxAI catalog
See other xAI models before narrowing your shortlist.
Open provider hubCheaper alternatives
Start from models sorted by a standard cost estimate when budget is the first constraint.
Browse low-cost modelsLong-context alternatives
Compare large-context models for retrieval, documents, and codebase review.
Browse long-context modelsHigh-Interest Comparisons
Search this model| Comparison | Cost-first Pick | Context Pick |
|---|---|---|
| Grok 4.3 vs Grok 4.20 | Tie | Grok 4.20 |
| MiniMax M2.7 vs Grok 4.3 | MiniMax M2.7 | Grok 4.3 |
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