chore(pricing): Update openai pricing

[siddharthsambharia-portkey]

🔄 Pricing Update: openai

📊 Summary (complete_diff mode)

Change Type	Count
➕ Models added	0
🔄 Models updated (merged)	21

🔄 Updated Models

• gpt-4.1-nano
• gpt-4.1-nano-2025-04-14
• o4-mini-deep-research-2025-06-26
• codex-mini-latest
• gpt-realtime
• gpt-realtime-2025-08-28
• gpt-realtime-mini
• gpt-4o-mini-realtime-preview
• gpt-4o-mini-realtime-preview-2024-12-17
• gpt-audio-mini
• gpt-4o-audio-preview
• gpt-4o-mini-audio-preview-2024-12-17
• gpt-image-1.5
• chatgpt-image-latest
• gpt-image-1
• gpt-image-1-mini
• sora-2-pro
• gpt-4o-mini-tts
• gpt-4o-transcribe
• gpt-4o-mini-transcribe
• whisper-1

Model Coverage (129 entries across 128 API models)

Batch	Models	Count
1	GPT-5.4, GPT-5.3, GPT-5.2 family (incl. codex, pro, chat-latest variants)	25
2	GPT-5-nano, GPT-5-pro, GPT-4.1, GPT-4o family (incl. search-preview)	25
3	O-series (o1, o1-pro, o3, o3-pro, o4-mini, deep-research), computer-use, codex-mini, legacy GPT-4/3.5	25
4	Realtime & Audio (gpt-realtime, gpt-audio, gpt-4o-realtime, gpt-4o-audio, mini variants)	22
5	Image models: gpt-image-1.5, chatgpt-image-latest, gpt-image-1, gpt-image-1-mini, dall-e-3, dall-e-2, sora-2, sora-2-pro	8
6	TTS, transcription (gpt-4o-mini-tts, gpt-4o-transcribe, whisper-1, tts-1, tts-1-hd), embeddings, moderation, legacy	24

Pricing Source

• Standard tier pricing from https://platform.openai.com/docs/pricing
• Audio token prices captured for realtime/audio models
• Image-per-image pricing captured for DALL-E, GPT-Image models
• Video per-second pricing captured for Sora models
• TTS priced per_million_characters; Whisper priced per_minute

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Generated by Pricing Agent on 2026-03-12