SpaceXAI: Grok 4.3 vs Gemini 3.5 Flash Lite
63.9 overall · $0.850 / 1M
// x-ai
SpaceXAI: Grok 4.3
x-ai/grok-4.3
reasoningtool callingimage inputfile inputprompt caching
SpaceXAI: Grok 4.3 costs $1.25 per 1M input tokens and $2.50 per 1M output tokens with a 1M-token context window.
A reasoning, tool-calling model from x-ai, released Apr 30, 2026. On LiveBench it scores 62.2 overall — #55 of 55 benchmarked models — and ranks highest in instruction following (#43).
- Input / 1M
- $1.25
- Output / 1M
- $2.50
- Context
- 1M
- LiveBench overall
- 62.2 · #55
Specs and pricing
| Input price USD per 1M prompt tokens | $1.25 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $2.50 |
| Blended price 3:1 input:output — #102 most expensive of 343 listed models | $1.56 |
| Cached input read Blank means not priced separately — not free | $0.200 |
| Cache write | — |
| Context window | 1,000,000 tokens |
| Max output | 900,000 tokens |
| Input modalities | text, image, file |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Apr 30, 2026 |
Also listed as x-ai/grok-4.3:batch ($1.25 blended)— the same model at a different price or rate limit.
Benchmarks by category
LiveBench scores out of 100, with SpaceXAI: Grok 4.3's rank among the 55 benchmarked models listed here. Run: grok-4.3.
Language#46 of 55
73.6
$0.0153 measured per point
What SpaceXAI: Grok 4.3 costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $424.40/mo |
| RAG assistant 8K in / 600 out × 100K requests | $730.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $612.00/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $1,385/mo |
| Bulk classification 500 in / 20 out × 5M requests | $2,850/mo |
Compare SpaceXAI: Grok 4.3 with
The benchmarked models closest to it on overall score.
qwen
SpaceXAI: Grok 4.3 vs Qwen3.6 27B
64.0 overall · $0.915 / 1M
deepseek
SpaceXAI: Grok 4.3 vs DeepSeek V4 Flash 0423
65.5 overall · $0.061 / 1M
openai
SpaceXAI: Grok 4.3 vs GPT-5.4 Mini
66.4 overall · $1.69 / 1M
minimax
SpaceXAI: Grok 4.3 vs MiniMax M3
67.3 overall · $0.525 / 1M
nvidia
SpaceXAI: Grok 4.3 vs Nemotron 3 Ultra
67.4 overall · $1.05 / 1M
SpaceXAI: Grok 4.3 FAQ
How much does SpaceXAI: Grok 4.3 cost?
SpaceXAI: Grok 4.3 lists at $1.25 per 1M input tokens and $2.50 per 1M output tokens, with cached input reads at $0.200 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $730.00 at list price.
What is the context window of SpaceXAI: Grok 4.3?
SpaceXAI: Grok 4.3 accepts up to 1,000,000 tokens of context and can return up to 900,000 output tokens per response.
Does SpaceXAI: Grok 4.3 support tool calling?
Yes — SpaceXAI: Grok 4.3 supports tool (function) calling and exposes extended reasoning. It accepts text, image, file input.
How does SpaceXAI: Grok 4.3 score on benchmarks?
On LiveBench release 2026-06-25 (run: grok-4.3), SpaceXAI: Grok 4.3 scores 62.2 overall, ranking #55 of 55 benchmarked models.
What is the API model ID for SpaceXAI: Grok 4.3?
On OpenRouter the model ID is "x-ai/grok-4.3". It was listed on Apr 30, 2026.
More from x-ai
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.