fix: 中转 gpt-realtime 系列 GA 模型时不再发送 realtime beta 标识

[feitianbubu]

📝 变更描述 / Description

OpenAI 已经下线 Realtime Beta API。现在网关中转 /v1/realtime 时无条件给上游带 OpenAI-Beta: realtime=v1会导致最新的正式模型报错

改法:只有模型名含 -realtime-preview 的遗留 beta 模型才携带该标识,GA 模型走正常请求

🚀 变更类型 / Type of change

• 🐛 Bug 修复 (Bug fix)
• ✨ 新功能 (New feature)
• ⚡ 性能优化 / 重构 (Refactor)
• 📝 文档更新 (Documentation)

🔗 关联任务 / Related Issue

• 无

✅ 提交前检查项 / Checklist

• 人工确认: 我已亲自整理并撰写此描述,没有直接粘贴未经处理的 AI 输出。
• 非重复提交: 我已搜索现有的 Issues 与 PRs,确认不是重复提交。
• Bug fix 说明: 若此 PR 标记为 `Bug fix`,我已提交或关联对应 Issue。
• 变更理解: 我已理解这些更改的工作原理及可能影响。
• 范围聚焦: 本 PR 未包含任何与当前任务无关的代码改动。
• 本地验证: 已在本地运行并通过测试或手动验证,维护者可以据此复核结果。
• 安全合规: 代码中无敏感凭据,且符合项目代码规范。

📸 运行证明 / Proof of Work

修复前,OpenAI SDK 直连网关 /v1/realtime?model=gpt-realtime-2.1-mini,上游立刻断连:

修复后: 实时语音识别正常:

Summary by CodeRabbit

• New Features
  • Added support for additional realtime model variants.
• Bug Fixes
  • Improved WebSocket connection handling so beta negotiation details are only sent when needed for legacy realtime models.
  • Reduced the chance of connection issues with newer realtime models by avoiding unnecessary beta headers.

[coderabbitai]

Walkthrough

The realtime WebSocket header setup now conditionally applies OpenAI beta protocol markers only for legacy -realtime-preview models, rather than unconditionally. Additionally, three new realtime model identifiers (gpt-realtime-2, gpt-realtime-2.1, gpt-realtime-2.1-mini) were added to the exported ModelList.

Changes

Realtime model support update

Layer / File(s)	Summary
Legacy beta header gating and new model entries relay/channel/openai/adaptor.go, relay/channel/openai/constant.go	SetupRequestHeader now checks for -realtime-preview in the model name to decide whether to include openai-beta.realtime-v1 / openai-beta: realtime=v1 headers, and ModelList gains three new realtime model entries.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• QuantumNous/new-api#3221: Both PRs modify OpenAI's exported ModelList in relay/channel/openai/constant.go by adding/reworking realtime model identifiers.

Suggested reviewers: seefs001

Poem

A hop, a header, a model or three,
Beta whispers now gated with glee,
Legacy previews get their old due,
While new realtime friends join the queue,
This rabbit thumps twice for the code review! 🐇✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题准确概括了本次对 gpt-realtime GA 模型握手中不再发送 beta 标识的主要改动。

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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