模型候選名單

Best long-context model APIs for large documents

Compare long-context model APIs by window size, price, source, and when a big context is actually worth paying for.

這份候選名單適合什麼用途?: Long-context models

Long context helps when you stuff contracts, exports, support history, or large files into the prompt. It also makes bills jump. Compare window size and input price together, and decide whether retrieval would be cheaper than stuffing the whole document every time.

來源依據: NextModel curated catalog and OpenRouter context metadata when available. · 更新日期 2026-07-01

如何使用这份名单

如何使用这份名单 (Long-context models)

  1. 对照任务选模型. 先看「Long-context models」短名单是否覆盖你的真实任务,不要只比标价。
  2. 用同一批提示词试跑. 挑 2–3 个候选,用业务提示词对比质量与输出长度。
  3. 估算月费. 用价格页或成本计算器,按预计 token 量估算月度花费。
  4. 定兜底与预算. 定主模型、兜底模型,设项目预算后再接生产流量。

上下文长度

推薦候選 long-context models

先從候選名單開始,再以真實提示詞測試,並在接入生產路由前比較月度成本。

OpenAICatalog

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...

Starting at $0.362 / 1M tokensInputStarting at $2.17 / 1M tokensOutput1.1MContext
Best forimage understanding, multimodal chat
RoutingConfigured
StreamingTool callingJSON modeVisionLong context
Platform curatedNextModel gateway catalog (Go origin)
View details
OpenAICatalog

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...

Starting at $4.34 / 1M tokensInputStarting at $26.04 / 1M tokensOutput1.1MContext
Best forimage understanding, multimodal chat
RoutingConfigured
StreamingTool callingJSON modeVisionLong context
Platform curatedNextModel gateway catalog (Go origin)
View details
OpenAICatalog

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...

Starting at $0.723 / 1M tokensInputStarting at $4.34 / 1M tokensOutput1.1MContext
Best forimage understanding, multimodal chat
RoutingConfigured
StreamingTool callingJSON modeVisionLong context
Platform curatedNextModel gateway catalog (Go origin)
View details
OpenAICatalog

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

Starting at $0.029 / 1M tokensInputStarting at $0.174 / 1M tokensOutput1.1MContext
Best forimage understanding, multimodal chat
RoutingConfigured
StreamingTool callingJSON modeVisionLong context
Platform curatedNextModel gateway catalog (Go origin)
View details

比較表

按價格、提供方、上下文、能力與來源比較這份候選名單。

當你在縮小正式環境候選名單、建立兜底策略或比較模型經濟性時,可使用此視圖。

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
OpenAI: GPT-5.4openai/gpt-5.4OpenAI$0.362 / 1M tokens$2.17 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
OpenAI: GPT-5.4 Proopenai/gpt-5.4-proOpenAI$4.34 / 1M tokens$26.04 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
OpenAI: GPT-5.5openai/gpt-5.5OpenAI$0.723 / 1M tokens$4.34 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
OpenAI: GPT-5.6 Lunaopenai/gpt-5.6-lunaOpenAI$0.029 / 1M tokens$0.174 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
OpenAI: GPT-5.6 Solopenai/gpt-5.6-solOpenAI$0.723 / 1M tokens$4.34 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
OpenAI: GPT-5.6 Terraopenai/gpt-5.6-terraOpenAI$0.289 / 1M tokens$1.74 / 1M tokens1.1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
Google: Gemini 2.5 Flashgoogle/gemini-2.5-flashGoogle$0.043 / 1M tokens$0.362 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated
Google: Gemini 3 Flash Previewgoogle/gemini-3-flash-previewGoogle$0.072 / 1M tokens$0.434 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1000-3000msCatalogPlatform curated

常見問題

Long-context models 常見問題

Is a larger context window always better?

No. Bigger windows help with big inputs. Cost, latency, retrieval design, and answer quality still decide whether it is a good idea.

When should I use retrieval instead of a huge context window?

When most of the document is irrelevant to each question. Pull the useful chunks, send less context, and keep a smaller model if quality holds.

How do I estimate cost for long-context traffic?

Multiply average input tokens (including stuffed documents) by input price, then add output. Long inputs dominate the bill more often than people expect.

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