Grok 4.5 — API Pricing & Benchmarks
Grok 4.5 is xAI's previous-generation reasoning model, released in 2026-07. The API costs $2.00 per 1M input tokens and $6.00 per 1M output tokens ($3.00 blended at a 3:1 ratio), with cached input at $0.30. It supports a 500K-token context window. On the independently measured Artificial Analysis Intelligence Index it scores 55.8, ranking #18 of 68 models tracked on this site, with a median output speed of 53 tokens/sec. Pricing was changed on 2026-08-25 (previously $2.00/$6.00 per 1M tokens).
Explore provider routes and additional benchmark sources for Grok 4.5
| Provider | xAI |
| Input price / 1M tokens | $2.00 |
| Output price / 1M tokens | $6.00 |
| Cached input / 1M tokens | $0.30 |
| Blended price (3:1) | $3.00 |
| Context window | 500K |
| Max output tokens | — |
| Knowledge cutoff | 2026-02 |
| License | proprietary |
| Input modalities | T+I |
| Output speed (tok/s) | 53 |
| Released | 2026-07 |
| Artificial Analysis Intelligence Index | 55.8 |
| LMArena Elo | 1452 |
| GPQA Diamond | 93.1% |
| SWE-bench Verified | 86.6% |
| Humanity's Last Exam | 42.7% |
| MMMU | 80.4% |
Where Grok 4.5 fits
On a blended 3:1 basis Grok 4.5 costs $3.00 per 1M tokens, cheaper than 34% of the 80 priced models in this index. It is a previous-generation model: usually only worth choosing if you have an existing integration, negotiated pricing, or need its specific behavior, since newer siblings offer better price-performance. Measured output speed of 53 tokens/sec is below the index median of 104 — typical of reasoning-heavy models, and worth checking against interactive latency budgets. Cached input is priced at $0.30 (85% below standard input), which rewards prompt structures with long stable prefixes — see our caching guide.
Price history
| Period | Input $/1M | Output $/1M | Cached $/1M |
|---|---|---|---|
| 2026-07-18 → 2026-08-25 | $2.00 | $6.00 | $0.50 |
| 2026-08-25 → current | $2.00 | $6.00 | $0.30 |
List-price changes recorded by this site. The full dataset is public: price-history.json (CC BY 4.0).
Alternatives at a similar price
- Grok 4.6 (xAI) — $3.00/1M blended, AA Index 60.9
- Qwen3.8-Max (Alibaba Qwen) — $3.00/1M blended, AA Index 58.1
- Mistral Medium 3.5 (Mistral AI) — $3.00/1M blended, AA Index 30.4
- Magistral Medium (Mistral AI) — $2.75/1M blended
About xAI
xAI's Grok models compete aggressively on price: Grok 4.6 ties the proprietary frontier on the Artificial Analysis index at a mid-tier price point, and the older Grok 4.x models are among the cheapest ways to buy a large context window.