AI Rate CardClaude Opus 4.5 (latest) vs X-Ai/Grok-4-Fast-Reasoning: API price and specs
X-Ai/Grok-4-Fast-Reasoning is 93% cheaper than Claude Opus 4.5 (latest) on input price.
X-Ai/Grok-4-Fast-Reasoning is 96% cheaper than Claude Opus 4.5 (latest) on output price.
X-Ai/Grok-4-Fast-Reasoning is 95% cheaper than Claude Opus 4.5 (latest) on a 1M-in / 200k-out workload.
X-Ai/Grok-4-Fast-Reasoning has a 900% larger context than Claude Opus 4.5 (latest).
| Field | Claude Opus 4.5 (latest) | X-Ai/Grok-4-Fast-Reasoning |
|---|---|---|
| Lowest input, per 1M | $2.50 +1288.9% | $0.18 |
| Median input, per 1M | $5.00 +2400% | $0.20 |
| Lowest output, per 1M | $12.50 +2677.8% | $0.45 |
| Median output, per 1M | $25.00 +4900% | $0.50 |
| Lowest unit price | — | — |
| Cost of 1M in + 200k out | $5.00 +1751.9% | $0.27 |
| Context | 200K +90% | 2M |
| Max output | 66K +96.7% | 2M |
| Providers | 30 | 7 +76.7% |
| Regions | EU, GLOBAL, US | US |
| Accepts | application/pdf, file, image, image/gif, image/jpeg, image/png, image/webp, pdf, text | image, text |
| Returns | text | text |
| Type | Text models | Text models |
| Free option | no | no |
| Cheapest provider | openrouter | jiekou |
Your own workload: how many tokens the model gets (input) and gives back (output) - for example, in a month. The "Cost" row of the table above is recalculated for these numbers, for each model.
Computed from current offers each time the page opens; the best value of a row is bold, the percent is how far behind the best.
Providers selling both
302ai, aihubmix, aiml, edenai, helicone, jiekou, poe
Frequently asked questions
Which is cheaper, Claude Opus 4.5 (latest) or X-Ai/Grok-4-Fast-Reasoning?
X-Ai/Grok-4-Fast-Reasoning is 93% cheaper than Claude Opus 4.5 (latest) on input price. X-Ai/Grok-4-Fast-Reasoning is 96% cheaper than Claude Opus 4.5 (latest) on output price. X-Ai/Grok-4-Fast-Reasoning is 95% cheaper than Claude Opus 4.5 (latest) on a 1M-in / 200k-out workload.
Which has the larger context, Claude Opus 4.5 (latest) or X-Ai/Grok-4-Fast-Reasoning?
Claude Opus 4.5 (latest): 200K tokens; X-Ai/Grok-4-Fast-Reasoning: 2M tokens.
Where can I use both Claude Opus 4.5 (latest) and X-Ai/Grok-4-Fast-Reasoning?
302ai, aihubmix, aiml, edenai, helicone, jiekou, poe