Grok 4.5
by xAI · x-ai/grok-4.5 · #235 cheapest of 325 paid models
Prices updated Jul 22, 2026, 1:31 AM UTC · refreshed hourly
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Compare vs:Claude Sonnet 5Claude Opus 4.6Claude Haiku 4.5GPT-5.6 Sol
Pricing
Input
$2.00
per 1M tokens
Output
$6.00
per 1M tokens
Blended (3:1)
$3.00
3 input : 1 output
Cache read
$0.30
per 1M cached tokens
Cache write
—
per 1M tokens
Cache & batch economics
Effective prices for Grok 4.5 with prompt caching.
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $3.00 | $0.21 | — |
| 50% | $2.36 | $0.125 | −40% |
| 90% | $1.85 | $0.057 | −73% |
*Example: 100K sticky context + 2K new input + 1K output. Batch discount is an approximate 50% off list rates (available for OpenAI / Anthropic / Google — not flagged for this creator). Confirm on the vendor’s pricing page.
What a request costs
| Workload | Input tokens | Output tokens | Cost / request | Cost / 1K requests |
|---|---|---|---|---|
| Short chat message | 500 | 300 | $0.0028 | $2.80 |
| Document summary | 8,000 | 1,000 | $0.022 | $22.00 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.072 | $72.00 |
| Long-context analysis | 150,000 | 5,000 | $0.33 | $330.00 |
Performance
Intelligence Index
53.8
AA composite quality
Coding Index
72.4
Math Index
—
Agentic Index
45.7
Output speed
74 tok/s
median
Time to first token
9.69s
median
Time to first answer
9.69s
after reasoning tokens
Artificial Analysis benchmarks
| Benchmark | Score |
|---|---|
| GPQA Diamond | 93.1% |
| Humanity's Last Exam | 40.3% |
| SciCode | 54.1% |
| AA-LCR (Long Context Reasoning) | 67.7% |
| Terminal-Bench 2.1 | 81.6% |
| τ³-Bench Banking | 32.6% |
Design Arena Elo
| Category | Elo |
|---|---|
| Website | 1,323 |
| Web apps | 1,270 |
| Full-stack | 1,302 |
| Android native | 1,263 |
| UI components | 1,331 |
| Data viz | 1,302 |
| 3D | 1,329 |
| Game dev | 1,330 |
| Agentic game dev | 1,227 |
| Godot game dev | 1,297 |
| HTML slides | 1,240 |
| Python→PPTX slides | 1,230 |
| Code categories | 1,323 |
Specs
Context window
500K
tokens
Max output
—
tokens
Input modalities
text, image, file
Tokenizer
Grok