Grok 4.6 Xhigh vs Tencent Hy4: which responds faster?

Here is how Grok 4.6 (Xhigh), built by SpaceXAI, lines up against Tencent Hy4 from Tencent. Tencent Hy4 starts answering far sooner, with a time to first token of 2.4 seconds compared with 47 seconds for Grok 4.6 Xhigh. The figures come from tracked catalogue data, not from our own testing, so treat them as a starting point for a trial on your tasks.

Speed and latency

Measured output speed is 62 tokens per second for Grok 4.6 Xhigh and 94 tokens per second for Tencent Hy4. That makes Tencent Hy4 roughly 1.5 times as fast at writing. Before any text appears, Grok 4.6 Xhigh takes 47 seconds and Tencent Hy4 2.4 seconds. Tencent Hy4 gets to its first token 20 times as fast. Waits that long are felt on every chat-style request, though they matter less for batch jobs.

For a 400-token response, first token plus generation comes to roughly 53 seconds on Grok 4.6 Xhigh and 6.6 seconds on Tencent Hy4.

The headline benchmark

Tencent Hy4 comes out ahead on the intelligence index, 34.6 to 31.0. A lead of this size is hard to dismiss as noise.

Across the 109 active models with an intelligence score in the catalogue, Grok 4.6 Xhigh ranks 49th and Tencent Hy4 ranks 42nd.

For coding or maths work specifically, the catalogue has no dedicated index on either side yet.

Generation gap

The release dates are August 12, 2026 for Grok 4.6 Xhigh and November 3, 2026 for Tencent Hy4, about 3 months apart.

Token pricing and a sample bill

Per million tokens, Grok 4.6 Xhigh charges $2.00 for input and $6.00 for output, while Tencent Hy4 charges $0.834 and $2.501. For output tokens, Grok 4.6 Xhigh is 2.4 times the price of Tencent Hy4.

For a sample workload of 1 million input tokens and 200,000 output tokens, Grok 4.6 Xhigh would cost $3.20 and Tencent Hy4 $1.33, a difference of $1.87. Scale it up to writing 2,000 drafts of 2,000 output tokens from 300-token prompts and the bill is $25.20 for Grok 4.6 Xhigh against $10.50 for Tencent Hy4. On a 3:1 blend of input to output tokens, that works out to $3.00 versus $1.251 per million.

Cost per point of intelligence

Dividing the blended price by the intelligence index gives a rough cost per point: $0.097 for Grok 4.6 Xhigh and $0.036 for Tencent Hy4, per million tokens. Tencent Hy4 scores higher and costs less per point, so on price per point there is nothing to trade off.