Grok Build 0.1
Grok Build 0.1 on Zumik: live pricing, context, and caching, routable by id or alias through one OpenAI-compatible endpoint.
At a glance.
| Provider | xAI |
| Family | grok |
| Released | 2026-04 |
| License | Proprietary |
| Context window | 256K tokens |
| Max output | 256K tokens |
| Modalities | text, image, pdf |
| Tool calling | Yes |
| Reasoning mode | Yes |
| Caching | context |
| Batch discount | No batch tier |
What reuse looks like here.
Pricing, context, and capabilities for Grok Build 0.1 are live, but it is outside the flagship set Zumik benchmarks in depth, so measured reuse, capture, and warm TTFT are not shown yet. Run a workload estimate or route it by id to start collecting traces.
What you actually pay once caching works.
At a typical 55% prefix reuse, a million input tokens on Grok Build 0.1 effectively costs $0.56 instead of $1.00 - blending to roughly $0.92 with a 25% output share. There is no batch tier, so cost control here leans on caching and routing.
Estimate it for your workloadRoute it directly by id, or let an alias pick it when it wins under policy.
Same OpenAI client, this model.
from openai import OpenAI
client = OpenAI(base_url="https://api.zumik.ai/v1", api_key="zk_live_...")
r = client.responses.create(
model="grok-build-0-1",
input="Draft a fix for the failing test.",
)
print(r.usage.input_tokens_cached) # confirm reuseGrok Build 0.1, answered.
How much does Grok Build 0.1 cost?
Grok Build 0.1 is $1.00 per million input tokens and $2.00 per million output tokens through Zumik. Cache reads are $0.20 per million, a 80% discount on input.
What is Grok Build 0.1's context window?
Grok Build 0.1 supports a 256K-token context window with up to 256K output tokens.
Run Grok Build 0.1 with reuse measured.
Point an OpenAI client at Zumik and see exactly how much of this model's input you are reusing.