GPT-6.1 Sol vs Claude Sonnet 5.5: Same $2/$10, Half the Cost per Task

Description and use

<p><a href="https://synthorai.io/models/gpt-6-1-sol/" rel="noopener noreferrer">GPT-6.1 Sol</a> and <a href="https://synthorai.io/models/claude-sonnet-5-5/" rel="noopener noreferrer">Claude Sonnet 5.5</a> have the same list price, $2 per million input tokens and $10 per million output, and very different costs per task. With each model at its API default effort (the setting for how much it reasons before answering), GPT-6.1 Sol cost about half as much (0.49x), and at a matched score on an independent index about a quarter. Against <a href="https://synthorai.io/models/claude-opus-5-5/" rel="noo

Problem

<p><a href="https://synthorai.io/models/gpt-6-1-sol/" rel="noopener noreferrer">GPT-6.1 Sol</a> and <a href="https://synthorai.io/models/claude-sonnet-5-5/" rel="noopener noreferrer">Claude Sonnet 5.5</a> have the same list price, $2 per million input tokens and $10 per million output, and very different costs per task. With each model at its API default effort (the setting for how much it reasons before answering), GPT-6.1 Sol cost about half as much (0.49x), and at a matched score on an independent index about a quarter. Against <a href="https://synthorai.io/models/claude-opus-5-5/" rel="noo

Outcome

<p><a href="https://synthorai.io/models/gpt-6-1-sol/" rel="noopener noreferrer">GPT-6.1 Sol</a> and <a href="https://synthorai.io/models/claude-sonnet-5-5/" rel="noopener noreferrer">Claude Sonnet 5.5</a> have the same list price, $2 per million input tokens and $10 per million output, and very different costs per task. With each model at its API default effort (the setting for how much it reasons before answering), GPT-6.1 Sol cost about half as much (0.49x), and at a matched score on an independent index about a quarter. Against <a href="https://synthorai.io/models/claude-opus-5-5/" rel="noo

Evidence

GPT-6.1 Sol vs Claude Sonnet 5.5: Same $2/$10, Half the Cost per Task

Source