SpaceXAI: Grok 4.3
by xAISpaceXAI: Grok 4.3 is a large language model from xAI. It costs $1.25 per million input tokens and $2.50 per million output tokens. Its context window is 1M tokens.
- Input / 1M tokens
- $1.25
- Output / 1M tokens
- $2.50
- Cached input / 1M
- $0.200
- Context window
- 1M
On repeated prefixes
tokens
This model also charges $0.005 per search request
That is $5.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.0025, so the search fee is 2.0× the token cost. Per-token rankings elsewhere ignore this entirely.
Who serves it cheapest
1 hosts serve Grok 4.3. Same weights, same API - the price difference is pure margin and routing.
| Provider | Input / 1M | Output / 1M | Context | Throughput | Uptime 24h |
|---|---|---|---|---|---|
| xAICheapest | $1.25 | $2.50 | 1M | - | 94.4% |
Benchmarks
Independent scores published alongside the catalogue.
- Intelligence index
- 25.4
- Coding index
- 42.2
- Agentic index
- 17.2
About Grok 4.3
Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Specifications
| Model ID | x-ai/grok-4.3 |
|---|---|
| Provider | xAI |
| Context window | 1M tokens |
| Max output | 900K tokens |
| Input modalities | text, image, file |
| Output modalities | text |
| Knowledge cutoff | - |
| Open weights | No |
| Released | April 30, 2026 |
Cheaper alternatives
Models that cost less than Grok 4.3 while keeping at least half its context window and every input modality it supports.
Frequently asked
How much does SpaceXAI: Grok 4.3 cost?
$1.25 per million input tokens and $2.50 per million output tokens. Cached input reads cost $0.200 per million tokens.
What is the context window of SpaceXAI: Grok 4.3?
1M tokens, with up to 900K tokens of output per request.
Does SpaceXAI: Grok 4.3 have extra fees beyond per-token pricing?
Yes. SpaceXAI: Grok 4.3 charges $0.005 per search request - $5.00 per 1,000 requests - on top of $1.25 per million input tokens and $2.50 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 2.0× the token cost.
Confirm against the source: xAI official pricing.