docs: restructure supported providers table

Replace the Models column with two columns for API key and subscription
support, add GitHub Copilot and Ollama Cloud, remove Amazon Nova (not
in the provider registry), and clarify custom providers as
OpenAI-compatible.

Author: brunobuddy

.changeset/readme-providers-table.md

@@ -0,0 +1,4 @@
+---
+---
+
+Docs: restructure supported providers table in README to show API key and subscription support per provider.

README.md

@@ -74,24 +74,24 @@ All routing data (tokens, costs, model, duration) is recorded automatically. You
 
 ## Supported providers
 
-Works with 300+ models across these providers:
-
-| Provider                                                                       | Models                                                               |
-| ------------------------------------------------------------------------------ | -------------------------------------------------------------------- |
-| [OpenAI](https://platform.openai.com/)                                         | `gpt-5.3`, `gpt-4.1`, `o3`, `o4-mini` + 54 more                      |
-| [Anthropic](https://www.anthropic.com/)                                        | `claude-opus-4-6`, `claude-sonnet-4.5`, `claude-haiku-4.5` + 14 more |
-| [Google Gemini](https://ai.google.dev/)                                        | `gemini-2.5-pro`, `gemini-2.5-flash`, `gemini-3-pro` + 19 more       |
-| [DeepSeek](https://www.deepseek.com/)                                          | `deepseek-chat`, `deepseek-reasoner` + 11 more                       |
-| [xAI](https://x.ai/)                                                           | `grok-4`, `grok-3`, `grok-3-mini` + 8 more                           |
-| [Mistral AI](https://mistral.ai/)                                              | `mistral-large`, `codestral`, `devstral` + 26 more                   |
-| [Qwen (Alibaba)](https://www.alibabacloud.com/en/solutions/generative-ai/qwen) | `qwen3-235b`, `qwen3-coder`, `qwq-32b` + 42 more                     |
-| [MiniMax](https://www.minimax.io/)                                             | `minimax-m2.5`, `minimax-m1`, `minimax-m2` + 5 more                  |
-| [Kimi (Moonshot)](https://kimi.ai/)                                            | `kimi-k2`, `kimi-k2.5` + 3 more                                      |
-| [Amazon Nova](https://aws.amazon.com/ai/nova/)                                 | `nova-pro`, `nova-lite`, `nova-micro` + 5 more                       |
-| [Z.ai (Zhipu)](https://z.ai/)                                                  | `glm-5`, `glm-4.7`, `glm-4.5` + 5 more                               |
-| [OpenRouter](https://openrouter.ai/)                                           | 300+ models from all providers                                       |
-| [Ollama](https://ollama.com/)                                                  | Run any model locally (Llama, Gemma, Mistral, ...)                   |
-| Custom providers                                                               | Any provider with an OpenAI-compatible API endpoint                  |
+Works with 300+ models across these providers. Connect with an API key, or reuse an existing paid subscription where supported:
+
+| Provider                                                                       | API key | Subscription               |
+| ------------------------------------------------------------------------------ | :-----: | :------------------------- |
+| [OpenAI](https://platform.openai.com/)                                         |   ✅    | ✅ ChatGPT Plus / Pro / Team |
+| [Anthropic](https://www.anthropic.com/)                                        |   ✅    | ✅ Claude Max / Pro          |
+| [Google Gemini](https://ai.google.dev/)                                        |   ✅    |                            |
+| [DeepSeek](https://www.deepseek.com/)                                          |   ✅    |                            |
+| [xAI](https://x.ai/)                                                           |   ✅    |                            |
+| [Mistral AI](https://mistral.ai/)                                              |   ✅    |                            |
+| [Qwen (Alibaba)](https://www.alibabacloud.com/en/solutions/generative-ai/qwen) |   ✅    |                            |
+| [MiniMax](https://www.minimax.io/)                                             |   ✅    | ✅ MiniMax Coding Plan       |
+| [Kimi (Moonshot)](https://kimi.ai/)                                            |   ✅    |                            |
+| [Z.ai (Zhipu)](https://z.ai/)                                                  |   ✅    | ✅ GLM Coding Plan           |
+| [GitHub Copilot](https://github.com/features/copilot)                          |         | ✅ Copilot subscription      |
+| [OpenRouter](https://openrouter.ai/)                                           |   ✅    |                            |
+| [Ollama](https://ollama.com/)                                                  |   ✅ Local   | ✅ Ollama Cloud              |
+| Custom providers (OpenAI-compatible)                                           |   ✅    |                            |
 
 ## Contributing