Claude Fable 5.1 Xhigh vs Tencent Hy4 compared

Comparing Claude Fable 5.1 (Xhigh, Default Fallback) with Tencent Hy4 is really a question of how much capability you are willing to give up, and what you get back for it. Cost is where they split the most, with Tencent Hy4 working out at about 6% of Claude Fable 5.1 Xhigh's blended rate. No hands-on testing went into this write-up; it summarises the recorded benchmark, price and speed data for both models.

Price per token

Claude Fable 5.1 Xhigh lists $10.00 per million input tokens and $50.00 per million output tokens; Tencent Hy4 lists $0.834 and $2.501. That makes Tencent Hy4's output 95% cheaper.

A reference job of 1 million input tokens and 200,000 output tokens costs $20.00 with Claude Fable 5.1 Xhigh and $1.33 with Tencent Hy4, so Tencent Hy4 saves $18.67. For extracting fields from 20,000 pages of 1,500 tokens into 150-token records, Tencent Hy4 would come in 93% lower: $450 for Claude Fable 5.1 Xhigh against $32.52 for Tencent Hy4.

Overall capability: 15.4 points apart

On the intelligence index, Claude Fable 5.1 Xhigh scores 50.0 against 34.6 for Tencent Hy4. A gap this large suggests the two are built for different jobs. Put another way, Tencent Hy4 would need 45% more on this index to draw level.

Across the 109 active models with an intelligence score in the catalogue, Claude Fable 5.1 Xhigh ranks 18th and Tencent Hy4 ranks 42nd.

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

Tencent Hy4 is the faster writer

Once a response is under way, Claude Fable 5.1 Xhigh produces roughly 61 tokens per second against 94 tokens per second for Tencent Hy4. That makes Tencent Hy4 roughly 1.5 times as fast at writing. The wait for the first token averages 98 seconds on Claude Fable 5.1 Xhigh against 2.4 seconds on Tencent Hy4. Claude Fable 5.1 Xhigh waits 41 times as long before its first token. A first-token wait of that length suits background work better than live conversation.

Put together, a 1,500-token answer would take about 2.0 minutes from Claude Fable 5.1 Xhigh and 18 seconds from Tencent Hy4, counting the first-token wait.

Score per dollar

A blunt value measure, blended price over intelligence score, puts Claude Fable 5.1 Xhigh at $0.40 and Tencent Hy4 at $0.036 per point. Claude Fable 5.1 Xhigh costs 11 times as much per point, which is the price of its lead.

Which is newer

The release dates are September 1, 2026 for Claude Fable 5.1 Xhigh and November 3, 2026 for Tencent Hy4, about 2 months apart.