AI_APICallError occurs after running Opencode with Azure GPT-5 Codex and GPT-5 for several minutes

The bug
After starting Opencode with the Ai Foundry Azure GPT-5 Codex and GPT-5 model, the application works as expected initially. However, after running it for a few minutes, the following error appears:

AI_APICallError: Item 'fc_0dc4d92ad113352f0068e68182f9c0819783624eeb74dcfc0e' of type 'function_call' was provided without its required 'reasoning' item:
'rs_0dc4d92ad113352f0068e68182ada481978281511f6e4248d4'.

Configuration: I tried this fix, but nothing changed

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "azure": {
      "models": {
        "gpt-5-codex": {
          "id": "gpt-5-codex",
          "name": "Azure GPT-5 Codex",
          "reasoning": false 
        }
      }
    }
  }
}

Even when I don't have the above config, I get the error.

Steps to Reproduce

Start Opencode with the Ai Foundry Azure GPT-5 Codex model.
Run it for a few minutes.
Observe the error output above.

Expected behavior
Opencode should continue running without encountering this error.

Additional Information

The error appears only after several minutes of runtime, not immediately.
Please investigate why this error occurs after successful initial execution and how to resolve it.

This issue might be a duplicate of existing issues. Please check:

gpt-5-codex failure: AI_APICallError: Item 'rs_... of type 'reasoning' was provided without its required following item. #2941: Very similar error with GPT-5-codex showing "AI_APICallError: Item 'rs_... of type 'reasoning' was provided without its required following item" - same pattern of reasoning items being required but missing
AI_APICallError with GPT-5-codex in Zero Data Retention organizations #2966: AI_APICallError with GPT-5-codex in Zero Data Retention organizations, also related to reasoning items not being persisted
Do not send reasoning traces and tool calls made during reasoning when switching from reasoning model to non reasoning model #3035: Related issue about reasoning traces confusing models when switching between reasoning and non-reasoning models

Feel free to ignore if none of these address your specific case.

I have the same issue. This happens with and without the tool in ./.opencode/tool/mytool.ts

AI_APICallError: litellm.BadRequestError: AzureException BadRequestError - {
  "error": {
    "message": "Missing required parameter: 'tools[0].name'.",
    "type": "invalid_request_error",
    "param": "tools[0].name",
    "code": "missing_required_parameter"
  }
}. Received Model Group=gpt-5-codex
Available Model Group Fallbacks=None

@patrafter1999

@patrafter1999 you said same error but that’s an entirely different error?

@rekram1-node

@rekram1-node any notable solutions that work, or any workarounds available??

@Quanta-Naut

@Quanta-Naut lemme do an azure deployment to test, i cant replicate w/ the other providers
ill try to get back to u on this tmr (2am where i am rn)

and this is on latest right? or at least some v0.14.xxx right?

@rekram1-node

@rekram1-node Yes this is on the latest.

I ran into this today as well

@sheldonhull

@sheldonhull are you on 0.15.7? Also are you also using azure?

I get this issue with Codex as well.. so it not entirely an opencode issue I'm afraid. Although it would be good to have a work-around as it makes it totally unusable.

@jaccoh

@jaccoh can you show me your opencode config? This has to do with reasoning metadata being dropped or missing, maybe your config would help me figure it out

@jaccoh

@jaccoh are you exportng it as toml? What's this?
[projects."/Users/jhoeve/PycharmProjects/bank_transactions_importer"]
trust_level = "trusted"

I don't think you shared your opencode.json?

@jaccoh are you exportng it as toml? What's this? [projects."/Users/jhoeve/PycharmProjects/bank_transactions_importer"] trust_level = "trusted"

I don't think you shared your opencode.json?

oops :)

{
 "$schema": "https://opencode.ai/config.json",
  "provider": {
    "azure": {
      "models": {
        "gpt-5-codex": {
          "options": {
            "reasoningEffort": "high",
            "textVerbosity": "low",
            "reasoningSummary": "auto",
            "include": ["reasoning.encrypted_content"],
          }
        }
      }
    }
  }
}

@rekram1-node

Hi @rekram1-node I get a similar error with all the gpt-5 models at the moment.

AI_APICallError: Item 'msg_0288ca1a50a0201e0068f16f8334d881968df03cba2706156d' of type 'message' was provided without its required 'reasoning' item:
'rs_0288ca1a50a0201e0068f16f7c85448196996ec857642b076b'.

I simplified my opencode.json to this:

{
    "$schema": "https://opencode.ai/config.json",
    "instructions": [
        "CLAUDE.md"
    ],
    "autoupdate": true,
    "mcp": {
        "firecrawl": {
            "type": "local",
            "command": [
                "npx",
                "-y",
                "firecrawl-mcp"
            ],
            "enabled": true,
            "environment": {
                "FIRECRAWL_API_KEY": "xxx"
            }
        },
        "sequential-thinking": {
            "type": "local",
            "command": [
                "npx",
                "-y",
                "@modelcontextprotocol/server-sequential-thinking"
            ],
            "enabled": true
        }
    }
}

Any idea what might be happening?

I'm on 0.15.8

IMHO the error is clear.. apparently answers can sometimes not contain reasoning and open code fails on it

is this happening no matter what you send or does it only happen if you do an abort mid convo

@rekram1-node

Hi @rekram1-node it happens no matter what I send. I have had to switch off openai models.

@zWingz

should be fixed in next release if you set this in your opencode.json:

{
  "azure": {
      "env": [
        "AZURE_API"
      ],
      "models": {
        "gpt-5-codex": {
          "name": "GPT-5-codex",
          "options": {
            "parallelToolCalls": false, # or "store": false
          }
        }
      }
    }
}

Thank u @zWingz

@rekram1-node

Awesome thanks @rekram1-node that worked

  "provider": {
    "openai": {
      "models": {
        "gpt-5-codex": {
          "id": "gpt-5-codex",
          "name": "GPT-5 Codex",
          "options": {
            "reasoningEffort": "medium",
            "textVerbosity": "low",
            "parallelToolCalls": false
          }
        },
        "gpt-5-mini": {
          "id": "gpt-5-mini",
          "name": "GPT-5 Mini",
          "options": {
            "reasoningEffort": "medium",
            "textVerbosity": "low",
            "parallelToolCalls": false
          }
        }
      }
    }
  },

ill release it tmr so we can fix azure, I will also look into "store": false and if we can use it a default and the tradeoffs so we can prevent this error going forward

Mine actually worked without tomorrow's release. I did upgrade to 0.15.10, but changed my config to the one I supplied. (I think my issue is slightly different as I'm not using azure) My error message was also "of type 'message'" instead of "of type 'function_call'"

u were using openai so that will work, but for azure it wont (yet) until i release, thats what my previous message meant to say

Ahh understood. Thanks!

Is it the .10 I need to test?

i will release today it will be 0.15.11

Edit: released

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AI_APICallError occurs after running Opencode with Azure GPT-5 Codex and GPT-5 for several minutes #3044

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AI_APICallError occurs after running Opencode with Azure GPT-5 Codex and GPT-5 for several minutes #3044

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github-actions commented on Oct 8, 2025

patrafter1999 commented on Oct 9, 2025

rekram1-node commented on Oct 9, 2025

Quanta-Naut commented on Oct 9, 2025

rekram1-node commented on Oct 9, 2025

rekram1-node commented on Oct 9, 2025

Quanta-Naut commented on Oct 9, 2025

sheldonhull commented on Oct 17, 2025

rekram1-node commented on Oct 17, 2025

jaccoh commented on Oct 19, 2025

rekram1-node commented on Oct 19, 2025

rekram1-node commented on Oct 19, 2025

jaccoh commented on Oct 19, 2025

adeperio commented on Oct 20, 2025

jaccoh commented on Oct 20, 2025

rekram1-node commented on Oct 20, 2025

adeperio commented on Oct 20, 2025

rekram1-node commented on Oct 21, 2025

adeperio commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

adeperio commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

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jaccoh commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

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