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AI_APICallError occurs after running Opencode with Azure GPT-5 Codex and GPT-5 for several minutes #2012

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opened 2026-02-16 17:33:43 -05:00 by yindo · 25 comments
yindo commented 2026-02-16 17:33:43 -05:00
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Originally created by @Quanta-Naut on GitHub (Oct 8, 2025).

Originally assigned to: @thdxr on GitHub.

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

  1. Start Opencode with the Ai Foundry Azure GPT-5 Codex model.
  2. Run it for a few minutes.
  3. 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.
Originally created by @Quanta-Naut on GitHub (Oct 8, 2025). Originally assigned to: @thdxr on GitHub. **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** 1. Start Opencode with the Ai Foundry Azure GPT-5 Codex model. 2. Run it for a few minutes. 3. 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.
yindo closed this issue 2026-02-16 17:33:43 -05:00
yindo commented 2026-02-16 17:33:43 -05:00
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@github-actions[bot] commented on GitHub (Oct 8, 2025):

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

  • #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
  • #2966: AI_APICallError with GPT-5-codex in Zero Data Retention organizations, also related to reasoning items not being persisted
  • #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.

@github-actions[bot] commented on GitHub (Oct 8, 2025): This issue might be a duplicate of existing issues. Please check: - #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 - #2966: AI_APICallError with GPT-5-codex in Zero Data Retention organizations, also related to reasoning items not being persisted - #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.
yindo commented 2026-02-16 17:33:43 -05:00
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@patrafter1999 commented on GitHub (Oct 8, 2025):

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 commented on GitHub (Oct 8, 2025): 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 ```
yindo commented 2026-02-16 17:33:43 -05:00
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@rekram1-node commented on GitHub (Oct 8, 2025):

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

@rekram1-node commented on GitHub (Oct 8, 2025): @patrafter1999 you said same error but that’s an entirely different error?
yindo commented 2026-02-16 17:33:43 -05:00
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@Quanta-Naut commented on GitHub (Oct 9, 2025):

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

@Quanta-Naut commented on GitHub (Oct 9, 2025): @rekram1-node any notable solutions that work, or any workarounds available??
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 9, 2025):

@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)

@rekram1-node commented on GitHub (Oct 9, 2025): @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)
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 9, 2025):

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

@rekram1-node commented on GitHub (Oct 9, 2025): and this is on latest right? or at least some v0.14.xxx right?
yindo commented 2026-02-16 17:33:44 -05:00
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@Quanta-Naut commented on GitHub (Oct 9, 2025):

@rekram1-node Yes this is on the latest.

@Quanta-Naut commented on GitHub (Oct 9, 2025): @rekram1-node Yes this is on the latest.
yindo commented 2026-02-16 17:33:44 -05:00
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@sheldonhull commented on GitHub (Oct 17, 2025):

I ran into this today as well

@sheldonhull commented on GitHub (Oct 17, 2025): I ran into this today as well
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 17, 2025):

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

@rekram1-node commented on GitHub (Oct 17, 2025): @sheldonhull are you on 0.15.7? Also are you also using azure?
yindo commented 2026-02-16 17:33:44 -05:00
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@jaccoh commented on GitHub (Oct 19, 2025):

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 commented on GitHub (Oct 19, 2025): 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.
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 19, 2025):

@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

@rekram1-node commented on GitHub (Oct 19, 2025): @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
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 19, 2025):

@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?

@rekram1-node commented on GitHub (Oct 19, 2025): @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?
yindo commented 2026-02-16 17:33:44 -05:00
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@jaccoh commented on GitHub (Oct 19, 2025):

@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 :)

{
 "$schema": "https://opencode.ai/config.json",
  "provider": {
    "azure": {
      "models": {
        "gpt-5-codex": {
          "options": {
            "reasoningEffort": "high",
            "textVerbosity": "low",
            "reasoningSummary": "auto",
            "include": ["reasoning.encrypted_content"],
          }
        }
      }
    }
  }
}
@jaccoh commented on GitHub (Oct 19, 2025): > [@jaccoh](https://github.com/jaccoh) are you exportng it as toml? What's this? [projects."/Users/jhoeve/PycharmProjects/bank_transactions_importer"] trust_level = "trusted" > > I don't think you shared your opencode.json? oops :) ``` { "$schema": "https://opencode.ai/config.json", "provider": { "azure": { "models": { "gpt-5-codex": { "options": { "reasoningEffort": "high", "textVerbosity": "low", "reasoningSummary": "auto", "include": ["reasoning.encrypted_content"], } } } } } } ```
yindo commented 2026-02-16 17:33:44 -05:00
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@adeperio commented on GitHub (Oct 20, 2025):

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

@adeperio commented on GitHub (Oct 20, 2025): 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
yindo commented 2026-02-16 17:33:44 -05:00
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@jaccoh commented on GitHub (Oct 20, 2025):

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

@jaccoh commented on GitHub (Oct 20, 2025): IMHO the error is clear.. apparently answers can sometimes not contain reasoning and open code fails on it
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 20, 2025):

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

@rekram1-node commented on GitHub (Oct 20, 2025): is this happening no matter what you send or does it only happen if you do an abort mid convo
yindo commented 2026-02-16 17:33:44 -05:00
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@adeperio commented on GitHub (Oct 20, 2025):

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

@adeperio commented on GitHub (Oct 20, 2025): Hi @rekram1-node it happens no matter what I send. I have had to switch off openai models.
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 21, 2025):

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 commented on GitHub (Oct 21, 2025): 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
yindo commented 2026-02-16 17:33:44 -05:00
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@adeperio commented on GitHub (Oct 21, 2025):

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
          }
        }
      }
    }
  },
@adeperio commented on GitHub (Oct 21, 2025): 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 } } } } }, ```
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 21, 2025):

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

@rekram1-node commented on GitHub (Oct 21, 2025): 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
yindo commented 2026-02-16 17:33:44 -05:00
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@adeperio commented on GitHub (Oct 21, 2025):

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'"

@adeperio commented on GitHub (Oct 21, 2025): 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'"
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 21, 2025):

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

@rekram1-node commented on GitHub (Oct 21, 2025): 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
yindo commented 2026-02-16 17:33:44 -05:00
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@adeperio commented on GitHub (Oct 21, 2025):

Ahh understood. Thanks!

@adeperio commented on GitHub (Oct 21, 2025): Ahh understood. Thanks!
yindo commented 2026-02-16 17:33:44 -05:00
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@jaccoh commented on GitHub (Oct 21, 2025):

Is it the .10 I need to test?

@jaccoh commented on GitHub (Oct 21, 2025): Is it the .10 I need to test?
yindo commented 2026-02-16 17:33:44 -05:00
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@rekram1-node commented on GitHub (Oct 21, 2025):

i will release today it will be 0.15.11

Edit: released

@rekram1-node commented on GitHub (Oct 21, 2025): i will release today it will be 0.15.11 Edit: released
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