Anthropic Claude
Configuring Anthropic Claude in Aimogen Pro, the available Claude models, context window behaviour, vision and tool-calling support, and common Claude errors.
Anthropic Claude models are widely used in Aimogen Pro for long-form writing and for agent work, where their long context windows and instruction-following matter.
Get a key#
- Sign in at console.anthropic.com.
- Go to Settings › API Keys and create a key.
- Add credit under Billing. Anthropic is prepaid; a zero balance returns a credit error immediately.
Configure#
Aimogen Pro › Settings › API Keys › Anthropic Claude API Keys
Paste one key per line. Select Test API key, then save.
Adding a Claude key makes every Claude model appear in every model selector across the plugin. You do not need to change Main API Service Provider Selector — Claude routing is decided by the model name.
Models#
Aimogen Pro 2.8.8 lists 17 Claude models.
| Model | Notes |
|---|---|
claude-opus-5 | Current top tier |
claude-sonnet-5 | Balanced flagship, added in 2.8.4 |
claude-opus-4-8 | Added in 2.8.1 |
claude-opus-4-7, claude-opus-4-6, claude-sonnet-4-6 | Previous generation |
claude-opus-4-5-20251101, claude-sonnet-4-5-20250929, claude-haiku-4-5-20251001 | Dated snapshots |
claude-opus-4-1-20250805, claude-opus-4-20250514, claude-sonnet-4-20250514 | Claude 4 |
claude-3-7-sonnet-20250219, claude-3-5-haiku-20241022, claude-3-haiku-20240307 | Claude 3.x |
claude-fable-5, claude-mythos-5 | Added in 2.8.2 |
The plugin tracks several capability sets internally so that features only offer models that support them: chat, 200K-context, and vision. Most current Claude models are in all three.
Capabilities in the plugin#
| Capability | Supported |
|---|---|
| Text generation | yes |
| Chat and streaming | yes |
| Vision (image input) | yes, on current models |
| Tool calling / Chatbot Extensions | yes |
| AI Agents | yes |
| Embeddings | no — Anthropic does not offer an embeddings API. Use OpenAI, Google or Ollama |
| Image generation | no — use an image provider |
| Assistants, Batch, fine-tuning | no — these are OpenAI-only in the plugin |
Context windows#
Claude models offer large context windows, and the plugin has a dedicated capability list for the 200K models. A large window is useful when you:
- Feed long scraped pages into a prompt
- Run retrieval with many chunks injected
- Let an agent accumulate a long working history
It is not free: input tokens are billed. See Controlling cost and Tokens, context and output length.
Common problems#
invalid x-api-key or authentication_error
The key is wrong, revoked, or has a stray character. Re-copy and use Test API key.
credit balance is too low
Anthropic is prepaid. Top up in the console.
overloaded_error or HTTP 529
Anthropic is shedding load. This is transient. Reliability Mode
classifies it as a provider failure and will cool the model down and fail over.
prompt is too long
Input exceeds the window. Reduce injected context, shorten the source material, or use a larger-context
model. See Tokens, context and output length.
Rate limits on a new account Anthropic tiers accounts by spend history. New accounts have low limits. Raise Delay Between API & Scraping Requests (ms) or add keys.
Endpoint used#
https://api.anthropic.com/v1/messagesRelated#
- Reliability Mode — pair Claude with a fallback for overload periods
- AI Agents
- Selecting models
Still stuck? Open a support ticket and include the diagnostics from Aimogen Pro › System & Logs › System Info.