Long-context AI models
Models whose linked official source reports a context window of at least one million tokens; actual limits vary by provider and interface.
| Model | Lab | Dated | Latest event | Weights | Input / output modalities | Context | Input / output | Verified | Source |
|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5.2 | Anthropic | released | — | Text and image input; text output | 1,000,000 | $8 / $40Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Muse Ember | Meta | released | — | Text, image, audio and video input; text output | 1,000,000 | $0.1 / $0.5Meta Model API Standard text rate; long-context tiers may differ. | Official ↗ | ||
| Gemini 4 Carbon | released | — | Text, image, video, audio and PDF input; text output | 1,048,576 | $2 / $10Gemini API Standard paid API rate; includes thinking tokens. No free tier. Introductory rate through November 30, 2026; $4 / $20 starting December 1. | Official ↗ | |||
| GPT-6.1 Terra | OpenAI | released | — | Text and image input; text output | 1,050,000 | $1 / $5OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| Muse Spark Open | Meta | released | Open weights | — | 1,000,000 | — | Official ↗ | ||
| Claude Haiku 5.5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $0.1 / $0.5Anthropic API Standard global text rate for prompts up to 100K tokens; higher rates above 100K and US-only inference surcharge may apply. | Official ↗ | ||
| Gemini 4 Argon | released | — | Text, image, video, audio and PDF input; text output | 1,048,576 | $2 / $10Gemini API Standard paid API rate; includes thinking tokens. No free tier. Introductory rate through November 30, 2026; $4 / $20 starting December 1. | Official ↗ | |||
| GPT-6.1 Sol | OpenAI | released | — | Text and image input; text output | 1,050,000 | $2 / $10OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| Claude Sonnet 5.5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $2 / $10Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Opus 5.5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $4 / $20Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| GPT-6 Luna | OpenAI | released | — | Text and image input; text output | 1,050,000 | $0.1 / $0.5OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| GPT-6 Sol | OpenAI | released | — | Text and image input; text output | 1,050,000 | $2 / $10OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| DeepSeek V4.1 Flash | DeepSeek | updated | Open weights | Text and image input; text output | 1,000,000 | $0.3 / $1.2DeepSeek API Peak cache-miss input / output rates. Off-peak rates: $0.15 / $0.60. Peak: 01:00–04:00 and 06:00–10:00 UTC on weekdays, excluding Chinese public holidays; all other hours are off-peak. API alias serves V4.1-Flash-1017. | Official ↗ | ||
| GPT-6 Astra | OpenAI | announced | — | Text and image input; text output | 1,050,000 | $10 / $50OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| Claude Fable 5.1 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $10 / $50Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Opus 5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $5 / $25Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| GPT-5.6 Luna | OpenAI | released | — | Text and image input; text output | 1,050,000 | $0.2 / $1.2OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| GPT-5.6 Sol | OpenAI | released | — | Text and image input; text output | 1,050,000 | $4 / $20OpenAI API Promotional standard text rate through November 30, 2026; higher long-context rates above 272K input tokens. | Official ↗ | ||
| GPT-5.6 Terra | OpenAI | released | — | Text and image input; text output | 1,050,000 | $2 / $12OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| Claude Sonnet 5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $2 / $10Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Fable 5 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $10 / $50Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Opus 4.8 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $5 / $25Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| DeepSeek V4 Pro | DeepSeek | updated | Open weights | Text input and output; vision not supported | 1,000,000 | $1.32 / $3.96DeepSeek API Peak cache-miss input / output rates. Off-peak rates: $0.66 / $1.98. Peak: 01:00–04:00 and 06:00–10:00 UTC on weekdays, excluding Chinese public holidays; all other hours are off-peak. API version: V4-Pro-0813. | Official ↗ | ||
| GPT-5.5 | OpenAI | released | — | Text and image input; text output | 1,050,000 | $5 / $30OpenAI API Standard text rate for prompts up to 272K input tokens; higher long-context and regional rates may apply. | Official ↗ | ||
| Claude Opus 4.7 | Anthropic | announced | — | — | 1,000,000 | $5 / $25Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Sonnet 4.6 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $3 / $15Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ | ||
| Claude Opus 4.6 | Anthropic | announced | — | Text and image input; text output | 1,000,000 | $5 / $25Anthropic API Standard global text rate; excludes batch and fast mode; US-only inference may add a surcharge. | Official ↗ |
Dated = a documented vendor milestone, not necessarily the first public announcement. Prices are USD per million text tokens where shown. Context varies by provider and interface; where a model has locally available weights, context may describe the official model card. “—” means not verified; check conditions and sources before use.
Pricing describes the cost per token, not the total cost of completing a task or the model's quality. Rates and access change; check each linked official source.
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