SpaceXAI: Grok 4.5 vs Gemini 3.8 Flash
75.8 overall · $1.50 / 1M
// x-ai
SpaceXAI: Grok 4.5
x-ai/grok-4.5
reasoningtool callingimage inputfile inputprompt caching
SpaceXAI: Grok 4.5 costs $2.00 per 1M input tokens and $6.00 per 1M output tokens with a 500K-token context window.
A reasoning, tool-calling model from x-ai, released Jul 8, 2026. On LiveBench it scores 75.8 overall — #26 of 55 benchmarked models — and ranks highest in agentic coding (#18).
- Input / 1M
- $2.00
- Output / 1M
- $6.00
- Context
- 500K
- LiveBench overall
- 75.8 · #26
Specs and pricing
| Input price USD per 1M prompt tokens | $2.00 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $6.00 |
| Blended price 3:1 input:output — #73 most expensive of 343 listed models | $3.00 |
| Cached input read Blank means not priced separately — not free | $0.300 |
| Cache write | — |
| Context window | 500,000 tokens |
| Max output | 450,000 tokens |
| Input modalities | text, image, file |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Jul 8, 2026 |
Benchmarks by category
LiveBench scores out of 100, with SpaceXAI: Grok 4.5's rank among the 55 benchmarked models listed here. Run: grok-4.5.
Language#18 of 55
82.8
$0.0219 measured per point
What SpaceXAI: Grok 4.5 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 | $837.60/mo |
| RAG assistant 8K in / 600 out × 100K requests | $1,280/mo |
| Coding agent 40K in / 4K out × 20K requests | $1,128/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $2,365/mo |
| Bulk classification 500 in / 20 out × 5M requests | $4,750/mo |
Compare SpaceXAI: Grok 4.5 with
The benchmarked models closest to it on overall score.
anthropic
SpaceXAI: Grok 4.5 vs Claude Sonnet 5
76.0 overall · $4.00 / 1M
z-ai
SpaceXAI: Grok 4.5 vs GLM 5.3
76.1 overall · $0.862 / 1M
anthropic
SpaceXAI: Grok 4.5 vs Claude Opus 4.8
76.2 overall · $10.00 / 1M
meta
SpaceXAI: Grok 4.5 vs Muse Spark 1.1
75.3 overall · $2.00 / 1M
qwen
SpaceXAI: Grok 4.5 vs Qwen3.8 27B
75.3 overall · $1.06 / 1M
SpaceXAI: Grok 4.5 FAQ
How much does SpaceXAI: Grok 4.5 cost?
SpaceXAI: Grok 4.5 lists at $2.00 per 1M input tokens and $6.00 per 1M output tokens, with cached input reads at $0.300 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $1,280 at list price.
What is the context window of SpaceXAI: Grok 4.5?
SpaceXAI: Grok 4.5 accepts up to 500,000 tokens of context and can return up to 450,000 output tokens per response.
Does SpaceXAI: Grok 4.5 support tool calling?
Yes — SpaceXAI: Grok 4.5 supports tool (function) calling and exposes extended reasoning. It accepts text, image, file input.
How does SpaceXAI: Grok 4.5 score on benchmarks?
On LiveBench release 2026-06-25 (run: grok-4.5), SpaceXAI: Grok 4.5 scores 75.8 overall, ranking #26 of 55 benchmarked models.
What is the API model ID for SpaceXAI: Grok 4.5?
On OpenRouter the model ID is "x-ai/grok-4.5". It was listed on Jul 8, 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.