– UNSUPPORTED

pydantic-ai 2.61.0

usage.stream-final-chunk · ollama

Requirements

Id	Level	Status	Evidence

Notes

pydantic-ai 2.61.0 implements OllamaModel via OpenAI-compatible Chat Completions only; there is no native /api/chat client. (https://ai.pydantic.dev/models/ollama/)

What the provider sent

Finish: stop
Raw finish: stop
Text: Atmospheric scattering of sunlight by air molecules prevents blue light from reaching the Earth's horizon and concentrates the remaining white light above it.
Tool calls: []
Usage: { "alternatives": {}, "cached_input": 0, "input": 24, "output": 28, "raw": { "eval_count": 28, "prompt_eval_cached_count": 0, "prompt_eval_count": 24 }, "reasoning": null, "total": 52 }
Stream completed: true
Error: null

Wire excerpt

status: 200
content-type: application/x-ndjson
body (ndjson):
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.023206005Z","message":{"role":"assistant","content":"At"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.132197654Z","message":{"role":"assistant","content":"mos"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.24271841Z","message":{"role":"assistant","content":"pheric"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.242776698Z","message":{"role":"assistant","content":" scattering"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.242876505Z","message":{"role":"assistant","content":" of"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.356821555Z","message":{"role":"assistant","content":" sunlight"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.356876698Z","message":{"role":"assistant","content":" by"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.465613792Z","message":{"role":"assistant","content":" air"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.575266255Z","message":{"role":"assistant","content":" molecules"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.575294768Z","message":{"role":"assistant","content":" prevents"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.684142858Z","message":{"role":"assistant","content":" blue"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.795010846Z","message":{"role":"assistant","content":" light"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.795040632Z","message":{"role":"assistant","content":" from"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.795279197Z","message":{"role":"assistant","content":" reaching"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.906040216Z","message":{"role":"assistant","content":" the"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:22.906072626Z","message":{"role":"assistant","content":" Earth"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.015606803Z","message":{"role":"assistant","content":"'s"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.12472855Z","message":{"role":"assistant","content":" horizon"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.233357827Z","message":{"role":"assistant","content":" and"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.343395886Z","message":{"role":"assistant","content":" concentrates"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.451399404Z","message":{"role":"assistant","content":" the"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.564501474Z","message":{"role":"assistant","content":" remaining"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.676932Z","message":{"role":"assistant","content":" white"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.785993926Z","message":{"role":"assistant","content":" light"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.786017179Z","message":{"role":"assistant","content":" above"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:23.895044469Z","message":{"role":"assistant","content":" it"},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:24.00383082Z","message":{"role":"assistant","content":"."},"done":false}
{"model":"qwen3.5:0.8b","created_at":"2026-10-12T19:01:24.11324866Z","message":{"role":"assistant","content":""},"done":true,"done_reason":"stop","total_duration":2372228610,"load_duration":2558208,"prompt_eval_count":24,"prompt_eval_cached_count":0,"prompt_eval_duration":271193000,"eval_count":28,"eval_duration":2089783000}

What the library reported

Outcome

unsupported

Finish

{
  "raw": null,
  "source": null,
  "surface": "absent",
  "value": null
}

Text

Value: null
Surface: absent

Tool calls

[]

Usage

{
  "cached_input": null,
  "input": null,
  "output": null,
  "reasoning": null,
  "surface": {
    "cached_input": "absent",
    "input": "absent",
    "output": "absent",
    "reasoning": "absent",
    "total": "absent"
  },
  "total": null
}

Stream

{
  "chunks_seen": 0,
  "completed": null,
  "used": true
}

Error

null

Unsupported reason

pydantic-ai 2.61.0 implements OllamaModel via OpenAI-compatible Chat Completions only; there is no native /api/chat client. https://ai.pydantic.dev/models/ollama/

Full observation JSON

{
  "elapsed_ms": 1.4040637761354446,
  "error": null,
  "finish": {
    "raw": null,
    "source": null,
    "surface": "absent",
    "value": null
  },
  "format": "wiretruth.observation/v1",
  "library": {
    "api": "Agent.run_stream_events",
    "language": "python",
    "name": "pydantic-ai",
    "version": "2.61.0"
  },
  "notes": [],
  "outcome": "unsupported",
  "stream": {
    "chunks_seen": 0,
    "completed": null,
    "used": true
  },
  "structured": {
    "attempted": false,
    "returned_as_success": false,
    "value": null
  },
  "text": {
    "surface": "absent",
    "value": null
  },
  "tool_calls": [],
  "unsupported_reason": "pydantic-ai 2.61.0 implements OllamaModel via OpenAI-compatible Chat Completions only; there is no native /api/chat client. https://ai.pydantic.dev/models/ollama/",
  "usage": {
    "cached_input": null,
    "input": null,
    "output": null,
    "reasoning": null,
    "surface": {
      "cached_input": "absent",
      "input": "absent",
      "output": "absent",
      "reasoning": "absent",
      "total": "absent"
    },
    "total": null
  }
}

Fixture

recorded ollama/usage.stream-final-chunk

Provenance	Value
Recorded at	2026-10-12T19:01:21Z
Requested model	qwen3.5:0.8b
Returned model	qwen3.5:0.8b
CI run	https://github.com/kartsan03/wiretruth/actions/runs/38294709109

Reproduce

wiretruth serve ollama/usage.stream-final-chunk

Plain-library snippet from the shim manifest.

Unsupported: OllamaModel uses only the OpenAI-compatible /v1 API, not native /api/chat.

Upstream

No matching upstream report.

History

Version	Grade
2.61.0	– UNSUPPORTED
2.56.0	– UNSUPPORTED