Week of Sep 21

What changed (from public sources)

Two price cuts, 90 minutes apart: Opus 5.5 and GPT-6 Sol, plus Grok 4.7 and a rebuilt Microsoft Copilot

Anthropic and OpenAI cut prices on the same day. Claude Opus 5.5 arrived on September 22 at $4 and $20 per million input and output tokens ^[1], and GPT-6 Sol followed about 90 minutes later at half the cost of the 5.6 series ^[4].

1. Claude Opus 5.5

   Input price per million tokens

   $5→$4 ^[2]

   Claude Opus 5.5 arrives at $4 per million input tokens, down from $5

   Anthropic says Claude Opus 5.5 performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than the previous version ^[1]. Input and output tokens now cost $4 and $20 per million, and cache reads $0.20 ^[1].

2. GPT-6 Sol

   GPT-6 Sol and a lighter Luna halve the price of OpenAI's mid-tier models

   OpenAI released GPT-6 Sol with a smaller GPT-6 Luna, at half the cost of the 5.6 series in the API ^[4]. Artificial Analysis reports Sol falling from $4/$20 to $2/$10 per million input/output tokens ^[3].

3. Grok 4.7

   $2

   Starting price per million input tokens ^[5]

   SpaceXAI releases Grok 4.7 for coding and knowledge work at an unchanged price

   SpaceXAI released Grok 4.7 for coding and knowledge work, served at the same price and speed as its predecessor ^[5]. It starts at $2 per million input tokens and $6 per million output tokens and is available in Cursor ^[5].

4. Microsoft Copilot

   Microsoft Copilot is rebuilt around Home, Code and Autopilot

   Microsoft introduced a new Microsoft Copilot with three parts: Home as the new starting point, Code for building apps, trackers, dashboards or automations from a natural-language description, and Autopilot, previously called Scout ^[6]. Home and Code start rolling out in Microsoft's Frontier program in the coming weeks, and Autopilot expands to private preview at the end of September ^[6].

5. Runway

   Runway puts its image and video generation inside DaVinci Resolve

   Runway launched a plugin that generates and restyles footage inside DaVinci Resolve Studio and imports the results straight onto the timeline ^[7]. The plugin is free for macOS and Windows, needs DaVinci Resolve Studio 19 or later, and generation uses credits on paid Runway plans ^[7].

Sources

1. Anthropic: Introducing Claude Opus 5.5
2. Artificial Analysis: Claude Opus 5.5 takes the top spot on the Intelligence Index
3. Artificial Analysis: GPT-6 Sol and Luna push the cost efficiency frontier
4. TechCrunch: OpenAI launches GPT-6 Sol and Luna
5. SpaceXAI: Introducing Grok 4.7
6. Microsoft: Introducing the new Copilot with Home, Code and Autopilot
7. Runway: Runway is now in DaVinci Resolve