Anthropic thinking models and grok do not work

[gradzio]

Currently the Anthropic thinking models (both opus and sonnet) throw no content in response error.

Grok seems to be having issues with making the http request.

[GregOnNet]

Hi,

I can reproduce this error, by running wcs eval --env=./config.mjs --model=claude-sonnet-4.5-with-thinking-16k --prompt-filter=goal-tracker .

wcs eval --env=./config.mjs --model=claude-sonnet-4.5-with-thinking-16k --prompt-filter=goal-tracker
╔═════════════════════════════ web-codegen-scorer ═════════════════════════════╗
║                                                                              ║
║   Running a codegen evaluation with configuration:                           ║
║                                                                              ║
║    - Environment: wcs-playground                                             ║
║    - Model: claude-sonnet-4.5-with-thinking-16k                              ║
║    - Runner: AI SDK                                                          ║
║    - MCP servers: none                                                       ║
║    - Concurrency: 12                                                         ║
║    - Framework: Angular                                                      ║
║    - Start time: 2/18/2026, 10:26:51 PM                                      ║
║    - Number of prompts: 1                                                    ║
║                                                                              ║
╚══════════════════════════════════════════════════════════════════════════════╝
✘ [goal-tracker] Failed to generate code with AI
  AI_NoOutputGeneratedError: No output generated.
Stack: AI_NoOutputGeneratedError: No output generated.
    at get output (file:///Users/gregor/Library/pnpm/global/5/.pnpm/ai@6.0.49_zod@3.25.76/node_modules/ai/dist/index.mjs:4331:13)
    at AiSdkRunner.generateConstrained (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/codegen/ai-sdk/ai-sdk-runner.js:57:30)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async AiSdkRunner.generateFiles (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/codegen/ai-sdk/ai-sdk-runner.js:68:26)
    at async generateCodeWithAI (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/orchestration/codegen.js:15:26)
    at async LocalExecutor.generateInitialFiles (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/orchestration/executors/local-executor.js:27:16)
    at async generateInitialFiles (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/orchestration/generate-initial-files.js:42:22)
    at async startEvaluationTask (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/orchestration/generate-eval-task.js:31:33)
    at async callWithTimeout (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/utils/timeout.js:17:16)
    at async evaluate (file:///Users/gregor/Library/pnpm/global/5/.pnpm/web-codegen-scorer@0.0.69_postcss@8.5.6/node_modules/web-codegen-scorer/runner/orchestration/generate.js:126:35)