Grok 4.5 is xAI’s previous long-context commercial model for reasoning, coding and live-information workflows. xAI’s current flagship on the API is Grok 4.6; keep 4.5 in the picture only if a workload is still pinned to that SKU.
At a glance
| Fact | Detail |
| --- | --- |
| Provider | xAI |
| Type | Commercial |
| Best for | Coding, agents, research, real-time information workflows |
| Context window | 500,000 tokens |
| API available | Yes |
| Local use | No |
| Last checked | 31 August 2026 |
Our verdict
Grok 4.5 was a capable $2 / $6 hosted model with a 500,000-token window. For new work, start with Grok 4.6, which xAI now presents as its flagship for code and general use at the same headline token rates.
| Score | Rating |
| --- | --- |
| Overall | ★★★★☆ |
| Coding | ★★★★☆ |
| Agents | ★★★★☆ |
| Research | ★★★★☆ |
| Budget | ★★★★☆ |
Pricing
Standard API prices per million tokens, as last listed for this SKU:
| Meter | Price |
| --- | --- |
| Input | $2.00 / million tokens |
| Cached input | Not separately listed in the public model pricing |
| Output | $6.00 / million tokens |
Confirm the live xAI table before production use; Grok 4.6 is the documented default.
Best for
- Existing 4.5 integrations that have not yet moved
- Comparison against Grok 4.6 on the same $2 / $6 headline rates
Avoid when
- You are starting a new xAI integration — use Grok 4.6
- You need local inference or open weights
What changed
- 31 August 2026: xAI’s public model index lists Grok 4.6 as the current flagship. This profile is retained as the 4.5 record.
- 17 July 2026: Profile created for Grok 4.5. Public API pricing and 500,000-token context window checked.
Related news
- Grok 4.6: pricing, capabilities and latest changes
- SpaceXAI ships Grok 4.5, Musk calls it an Opus-Class model at half the price
- OpenAI’s GPT-5.6 push is really a pricing war for enterprise AI
