Rename Swift 1.5 fast variant to INT4 heads

README.md

@@ -36,7 +36,7 @@ Upstream checkpoint: [TheUnderscore/Swift-Qwen3.8-27b-W4A16-AWQ](https://hugging
 
 ## Performance
 
-| Measurement | Qwen — HyperQwen fast quant (W4A16 AutoRound) | Swift 1.0 | Swift 1.5 INT8 heads | Swift 1.5 fast |
+| Measurement | Qwen — HyperQwen fast quant (W4A16 AutoRound) | Swift 1.0 | Swift 1.5 INT8 heads | Swift 1.5 INT4 heads |
 |---|---:|---:|---:|---:|
 | **Average request time ↓** | **108.1 s** | **66.2 s** | **72.2 s** | **68.2 s** |
 | **Average output tokens/task ↓** | **8,985** | **5,245** | **5,751** | **5,669** |
@@ -45,7 +45,7 @@ Upstream checkpoint: [TheUnderscore/Swift-Qwen3.8-27b-W4A16-AWQ](https://hugging
 
 ## Quality
 
-| Test | Qwen — HyperQwen fast quant (W4A16 AutoRound) | Swift 1.0 | Swift 1.5 INT8 heads | Swift 1.5 fast |
+| Test | Qwen — HyperQwen fast quant (W4A16 AutoRound) | Swift 1.0 | Swift 1.5 INT8 heads | Swift 1.5 INT4 heads |
 |---|---:|---:|---:|---:|
 | **GSM8K — 200-question subset** | 97.5% | 98.0% | 98.0% | 97.5% |
 | **IFBench — 300 prompts, strict** | 74.0% | 73.3% | 73.7% | 72.3% |

RELEASE_MANIFEST.json

@@ -18,8 +18,8 @@
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     "RUNTIME.md": {
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