Here is the top 10 right now:
| Rank | Model | YapIndex | YapTax$ |
| ---: | ---------------------------------------- | ---------: | ------: |
| 1 | openai/gpt-5.6-sol (reasoning) | 18.5 ±4.8 | 0.51 |
| 2 | openai/gpt-5.6-sol | 19.2 ±4.4 | 0.51 |
| 3 | openai/gpt-3.5-turbo | 22.7 ±4.8 | 0.02 |
| 4 | openai/gpt-5.6-luna | 27.8 ±9.8 | 0.15 |
| 5 | openai/gpt-5.4 (reasoning) | 40.7 ±10.7 | — |
| 6 | openai/gpt-5.4 | 40.7 ±9.0 | — |
| 7 | moonshotai/kimi-k2-0905 | 44.7 ±4.8 | 0.05 |
| 8 | mistralai/mistral-small-2603 (reasoning) | 46.2 ±31.5 | 0.03 |
| 9 | openai/gpt-4 | 51.2 ±20.6 | 1.39 |
| 10 | openai/gpt-5.3-codex | 64.8 ±9.9 | — |
| Rank | Model | YapIndex | YapTax$ |
| ---: | --------------------------------------- | ----------: | ------: |
| 23 | anthropic/claude-opus-4.5 | 97.0 ±28.9 | 1.52 |
| 25 | anthropic/claude-opus-4.5 (reasoning) | 99.2 ±29.3 | 1.44 |
| 42 | anthropic/claude-3.5-sonnet | 199.7 ±24.5 | 2.53 |
| 57 | anthropic/claude-sonnet-4.5 (reasoning) | 278.7 ±41.7 | 1.65 |
| 61 | anthropic/claude-sonnet-4.5 | 285.0 ±39.4 | 1.63 |
| 71 | anthropic/claude-opus-4.6 | 330.3 ±59.1 | — |
| 72 | anthropic/claude-haiku-4.5 | 333.2 ±26.7 | 0.64 |
| 73 | anthropic/claude-haiku-4.5 (reasoning) | 335.2 ±26.8 | 0.65 |
| 76 | anthropic/claude-opus-4.6 (reasoning) | 342.3 ±30.5 | — |
| 87 | anthropic/claude-3.5-haiku | 401.2 ±25.4 | 0.59 |
| 88 | anthropic/claude-sonnet-4.6 (reasoning) | 422.8 ±23.3 | — |
| 89 | anthropic/claude-sonnet-4.6 | 425.0 ±26.3 | — |
I have bent over backwards trying to enforce brevity with deepseek v4 flash to the point where I think I broke some things trying to do prompt injection in my Hermes setup and was still unsuccessful.
Meanwhile Sol blows me away and I want that to be my default for everything now.
In general though I seem to have the most success with a "<=10w" requirement in my prompts.
What I don't see listed and would be a good comparison is the STS models. OpenAI's live model is an absolute joy to talk with.