# Technical Data Extraction: Perplexity vs. Context Length Chart
## 1. Image Overview
This image is a line graph illustrating the relationship between **Context** (x-axis) and **Perplexity** (y-axis) for various configurations of a language model. The chart compares a baseline model with a 4K context window against several models configured with a 32K context window using different "base" parameters.
## 2. Component Isolation
### A. Header/Metadata
* **Language:** English.
* **Content:** No explicit title is present within the image frame.
### B. Main Chart Area
* **Y-Axis Label:** Perplexity
* **Y-Axis Scale:** Linear, ranging from 5 to 20. Major tick marks are placed at intervals of 2 (6, 8, 10, 12, 14, 16, 18, 20).
* **X-Axis Label:** Context
* **X-Axis Scale:** Linear, ranging from 5,000 to 30,000. Major tick marks are placed at intervals of 5,000 (5000, 10000, 15000, 20000, 25000, 30000).
* **Grid:** Horizontal and vertical dashed light-gray grid lines corresponding to the major tick marks.
### C. Legend (Spatial Grounding: Top-Right Quadrant)
The legend is located at approximately `[x=0.65 to 0.95, y=0.05 to 0.50]` in normalized coordinates from the top-left. It contains seven entries:
1. **Blue line:** `32K-base:1e4`
2. **Green line:** `32K-base:2e5`
3. **Orange line:** `32K-base:9e5`
4. **Red line:** `32K-base:5e6`
5. **Purple line:** `32K-base:1e9`
6. **Dark Gray/Black line:** `32K-base:1e12`
7. **Light Gray line:** `4K-Baseline`
---
## 3. Trend Verification and Data Extraction
### Series 1: 4K-Baseline (Light Gray)
* **Trend:** Sharp exponential upward slope. The perplexity explodes almost immediately after the 5,000 context mark.
* **Data Points:**
* At Context 5,000: ~8.2
* At Context 6,000: ~10.2
* At Context 7,500: Exceeds 20.0 (off-chart).
### Series 2: 32K-base Group (Multiple Colors)
* **Trend:** All 32K-base models follow a nearly identical, stable horizontal trend. They maintain low perplexity (between 8 and 10) across the entire context range shown (5,000 to 31,000). There is a very slight, gradual increase in perplexity as context increases, with a small "hump" or local peak around Context 19,000.
* **Detailed Comparison:**
* **32K-base:1e4 (Blue):** Generally the highest perplexity among the 32K group, ending near 9.5 at Context 31,000.
* **32K-base:1e12 (Dark Gray):** Closely follows the blue line.
* **32K-base:5e6 (Red):** Generally the lowest perplexity among the 32K group, ending near 9.0 at Context 31,000.
* **Representative Data Points (Approximate Average of Group):**
* Context 5,000: ~8.1
* Context 10,000: ~8.3
* Context 15,000: ~8.2
* Context 19,000: ~8.8 (Local peak)
* Context 25,000: ~8.7
* Context 31,000: ~9.1 to 9.5
---
## 4. Summary Table of Extracted Data
| Context Length | 4K-Baseline Perplexity | 32K-base (Group Avg) Perplexity |
| :--- | :--- | :--- |
| 5,000 | ~8.2 | ~8.1 |
| 7,500 | > 20.0 | ~8.4 |
| 10,000 | N/A (Off-chart) | ~8.3 |
| 15,000 | N/A | ~8.2 |
| 20,000 | N/A | ~8.7 |
| 25,000 | N/A | ~8.7 |
| 30,000 | N/A | ~9.2 |
## 5. Technical Conclusion
The chart demonstrates that the **4K-Baseline** model fails to generalize beyond its training window, as evidenced by the vertical spike in perplexity after 5,000 context tokens. Conversely, all **32K-base** variants (ranging from 1e4 to 1e12) successfully maintain performance (low perplexity) up to at least 31,000 context tokens, with only marginal differences between the specific base configurations.
