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Documentation Index

Fetch the complete documentation index at: https://docs.openai-nebula.com/llms.txt

Use this file to discover all available pages before exploring further.

Welcome to Nebula Api changelog. Here you can find our latest model releases, pricing updates, and feature announcements.
Bookmark: Press Ctrl+D to bookmark this page and stay updated!

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🔥 Latest Updates

03/05 GPT-5.4 Series

OpenAI’s latest production model line is now available: gpt-5.4 / gpt-5.4-pro / gpt-5.4-mini / gpt-5.4-nano for complex reasoning, coding, and high-throughput workloads.

02/10 Doubao Seedream 5.0

ByteDance’s latest image model doubao-seedream-5-0-260128 is now available with stronger instruction following, real-time search enhancement, and improved generation consistency.

02/05 Claude 4.6 Series

Anthropic’s Claude 4.6 models are available: claude-sonnet-4-6 and claude-opus-4-6, with stronger coding, long-horizon agent tasks, and long-context capabilities.

02/19 Gemini 3.1 Series

Google Gemini 3.1 models are now available, including gemini-3.1-pro-preview and flash variants for multimodal and long-context workflows.

03/24 China model lineup update

DeepSeek, Kimi, Qwen, GLM, and Doubao lines were refreshed together, including deepseek-v3-2-251201, kimi-k2.5, and glm-5.

12/12 GPT-5.2 Series

OpenAI’s newest flagship iteration! Better reasoning and coding, same price as GPT-5.1; GDPval real-world tasks: 70.9% on par with 14-year experts; ARC-AGI 2: 52.9%.

12/04 SeeDream 4.5

BytePlus best 4K image generation model! 1.2B parameters, enhanced text rendering, supports 10 reference images, $0.035/image!

11/25 Claude Opus 4.5

Anthropic’s latest flagship! SWE-bench 80.9% beats all competitors, price reduced to 1/3, supports Claude Code!

11/20 Gemini 3 Pro Preview

Google’s latest multimodal model! LMArena 1501 Elo #1, 1M context, thinking output support!

11/14 GPT-5.1 Series

OpenAI’s latest iteration! Intelligence and speed balanced, SWE-bench 76.3%, 24-hour caching!

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📅 March 2026

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🚀 GPT-5.4 Series Released (03/05)

OpenAI’s new flagship-for-work series is now available across ChatGPT, API, and Codex:
  • Official positioning: GPT‑5.4 is presented as a frontier model for professional work, with gpt-5.4-pro for maximum performance
  • Native computer use: First general-purpose OpenAI model with native computer-use support for agent workflows
  • Long context: Supports up to 1M token context in Codex/API scenarios
  • Efficiency upgrade: Officially positioned as more token-efficient than GPT‑5.2 for many complex tasks

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🎨 Doubao Seedream 5.0 Released (02/10)

ByteDance Seed’s latest image model is now available:
  • Model name: doubao-seedream-5-0-260128
  • Official focus: Seedream 5.0 Lite emphasizes “deeper thinking, more accurate generation”
  • Core capabilities: Better multimodal understanding/reasoning, stronger consistency and instruction following
  • Official feature: Real-time search enhancement (toggleable) for time-sensitive creation workflows

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🧠 Claude 4.6 Series Update (02/05)

Anthropic’s new generation is now supported:
  • Flagship pair: claude-sonnet-4-6 + claude-opus-4-6
  • Official upgrades: Improved coding, debugging, code review, and long-running agent performance
  • Long context: Anthropic officially introduced 1M token context (beta) for Opus-class workflows

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🌟 Gemini 3.1 Series Released (02/19)

Google’s latest Gemini generation is now available:
  • Official positioning: Gemini 3.1 Pro is announced as a stronger core model for complex tasks (Preview)
  • Capability direction: Improved reasoning for hard problem-solving and more advanced agentic workflows
  • Availability: Rolled out via Gemini API, Vertex AI, Gemini app, NotebookLM, and related developer channels
  • Current options: gemini-3.1-pro-preview, gemini-3.1-flash-lite-preview, gemini-3.1-flash-image-preview

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📅 December 2025

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🚀 GPT-5.2 Series Released (12/12)

OpenAI’s year-end upgrade for Chat, Reasoning, and Code:
  • Performance: Improved reasoning chain; more stable code/tool calls; better SWE-bench than 5.1
  • Pricing: Same as GPT-5.1, keeping strong value
  • Compatibility: Streaming, tool calling, and thinking/reasoning remain backward-compatible
  • Productivity focus: Targeted at spreadsheets, decks, long docs, and coding; positioned as a “brainwork partner”
  • GDPval benchmark: Across 44 professions and 1,320 real tasks, GPT-5.2 matches or beats 14-year experts in 70.9% of cases
  • ARC-AGI 2 leap: Thinking version scores 52.9% (up from 17.6%), notably ahead of Gemini 3 Pro / Claude peers
  • Single mega-agent: Lower tool-call latency, smoother multi-tool orchestration
  • Vision + long context: Industrial-grade vision (e.g., circuit boards, wave simulations) with ultra-long context for multi-file and long-doc analysis

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🎨 SeeDream 4.5 Released

BytePlus latest image generation model!
  • Ultra-high resolution: 4K image generation
  • Parameter upgrade: 1.2B parameters
  • Text rendering: Significantly enhanced
  • Reference images: Up to 10 reference images
  • Low price: Only $0.035/image

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📅 November 2025

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🚀 Claude Opus 4.5 Released

Anthropic’s latest flagship model!
  • #1 Coding: SWE-bench Verified 80.9%
  • Price drop: 1/3 of previous Opus 4
  • Claude Code: Full support
  • 200K context: Extended context window

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🌟 Gemini 3 Pro Preview Released

Google’s latest multimodal model!
  • LMArena #1: 1501 Elo score
  • 1M context: Ultra-long context
  • Multimodal king: Text/image/video/audio
  • Thinking output: Full reasoning process

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🚀 GPT-5.1 Series Released

OpenAI’s latest iteration!
  • Performance: SWE-bench Verified 76.3%
  • Speed: 2-5x faster for simple tasks
  • Caching: 24-hour prompt caching
  • Tools: Apply_Patch and Shell tools

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📅 October 2025

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🎥 Sora 2 Video Generation API

OpenAI’s revolutionary video model!
  • Audio sync: Auto-generated sound effects
  • No watermark: Commercial-grade output
  • Low price: Starting at $0.15/generation

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⚡ Claude Haiku 4.5 Released

High value coding model!
  • SWE-bench 73.3%: Excellent coding
  • 2x faster: Improved response speed
  • 1/3 cost: Great value

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💻 GLM-4.6 Released

Zhipu AI code and reasoning enhanced!
  • 200K context: Extended context
  • Code enhanced: Better programming
  • Reasoning upgraded: Stronger logic

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📅 September 2025

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🚀 Claude Sonnet 4.5 Released

World’s best coding model!
  • SWE-bench 77.2%: Best coding performance
  • Full upgrade: All capabilities improved

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🌐 Grok Web Search Models

Native web search!
  • Grok-4-all / Grok-3-all: Built-in web search
  • Real-time info: Latest web information

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⚡ Grok-4-fast Series Released

Ultra-long context at lowest price!
  • 200K Tokens: Extended context
  • 93%+ price drop: Best value

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📅 August 2025

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🚀 GPT-5 Series Released

OpenAI’s latest flagship!
  • Same price: 20% off
  • Full series: GPT-5, GPT-5-mini, etc.

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🎯 OpenAI Open Source Models

OpenAI’s first open source models!
  • gpt-oss-120b: 120B parameter model
  • gpt-oss-20b: 20B lightweight version
  • Local deployment: Edge computing support

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📊 Update Statistics

  • 🚀 GPT-5.4 Series: Pro/Mini/Nano options with stronger reasoning, coding, and agent workflows
  • 🎨 Doubao Seedream 5.0: Better multimodal understanding, consistency, and real-time-search-enhanced creation
  • 🧠 Claude 4.6 Series: Stronger long-horizon coding and long-context enterprise tasks
  • 🌟 Gemini 3.1 Series: Upgraded core reasoning for advanced multimodal and agentic workflows
  • 🚀 GPT-5.2: GDPval 70.9% matches/beats 14-year experts; ARC-AGI 2 at 52.9%; major gains in reasoning/coding/office workflows
  • 🎨 SeeDream 4.5: 4K image generation, better text rendering, $0.035/image
  • 🚀 Claude Opus 4.5: SWE-bench 80.9%, world’s best coding model
  • 🌟 Gemini 3 Pro Preview: LMArena 1501 Elo #1 globally
  • 🚀 GPT-5.1 Series: Intelligence and speed balanced
  • 🎨 SeeDream 4.5: 4K image generation, $0.035/image
  • ⚡ Claude Haiku 4.5: High value coding model
  • 🎬 Sora 2: Video generation revolution
  • 💻 GLM-4.6: Code and reasoning enhanced
  • 🚀 Claude Sonnet 4.5: World’s best coding model
  • 🌐 Grok web models: Native web search
  • ⚡ Grok-4-fast: 200K context at lowest price
Update frequency: This page is updated regularly. Bookmark and check often for latest announcements.Tip: New models often have special launch promotions. Try them early!