Add Claude Opus 5 support

Uses the anthropic-v2 variant set (adaptive summarized thinking) like the
other gen-5 models, matched via the opus-5 regex in variantsByModel.

🤖 Generated with [ECA](https://eca.dev) (nubank-anthropic/fable-5 - max)

Co-Authored-By: eca-agent <git@eca.dev>

Author: ericdallo

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Add Claude Opus 5 support.
+
 ## 0.150.0
 
 - Abort in-flight LLM streaming requests promptly on prompt stop for OpenAI, GitHub Copilot, Google, Ollama and custom OpenAI-compatible providers (previously only Anthropic/Bedrock), including while waiting for the first token. #554

docs/config/variants.md

@@ -27,9 +27,9 @@ ECA ships with built-in variants for some known models via the `variantsByModel`
     | `high`     | `{"output_config": {"effort": "high"}, "thinking": {"type": "adaptive"}}` |
     | `max`      | `{"output_config": {"effort": "max"}, "thinking": {"type": "adaptive"}}` |
 
-=== "Anthropic (opus 4.7+, sonnet/fable/mythos 5)"
+=== "Anthropic (opus 4.7+, opus/sonnet/fable/mythos 5)"
 
-    Applies to models matching `opus-4-7`, `opus-4-8`, `sonnet-5`, `fable-5`, `mythos-5` (any separator: `-`, `.`, `_`).
+    Applies to models matching `opus-4-7`, `opus-4-8`, `opus-5`, `sonnet-5`, `fable-5`, `mythos-5` (any separator: `-`, `.`, `_`).
 
     | Variant    | Payload |
     | ---------- | ------- |

src/eca/config.clj

@@ -118,6 +118,7 @@
                                      "claude-opus-4-6" {}
                                      "claude-opus-4-7" {}
                                      "claude-opus-4-8" {}
+                                     "claude-opus-5" {}
                                      "claude-fable-5" {}
                                      "claude-mythos-5" {}}}
                "github-copilot" {:api "openai-chat"
@@ -221,8 +222,8 @@
               :outputTruncation {:lines 2000 :sizeKb 50}}
    :variantsByModel {".*sonnet[-._]4[-._]6|opus[-._]4[-._][56]" {:variants anthropic-variants
                                                                  :api ["anthropic" "bedrock"]}
-                     ".*opus[-._]4[-._][78]|.*sonnet[-._]5|.*fable[-._]5|.*mythos[-._]5" {:variants anthropic-v2-variants
-                                                                                          :api ["anthropic" "bedrock"]}
+                     ".*opus[-._]4[-._][78]|.*opus[-._]5|.*sonnet[-._]5|.*fable[-._]5|.*mythos[-._]5" {:variants anthropic-v2-variants
+                                                                                                       :api ["anthropic" "bedrock"]}
                      ".*gpt[-._]5(?:[-._](?:2|4|5)(?!\\d)|[-._]3[-._]codex)" {:variants openai-variants
                                                                               :excludeProviders ["github-copilot"]}
                      ".*gpt[-._]5[-._]6(?!\\d)" {:variants openai-gpt-5-6-variants

src/eca/models.clj

@@ -167,6 +167,7 @@
     "anthropic/claude-opus-4-7"
     "anthropic/claude-opus-4.8"
     "anthropic/claude-opus-4-8"
+    "anthropic/claude-opus-5"
     "anthropic/claude-sonnet-5"
     "anthropic/claude-fable-5"
     "anthropic/claude-mythos-5"