Best LLM APIs for Long Context Windows
LLM APIs with the largest context windows. Compare models that support 100K+ tokens for document analysis, codebase processing, and long conversations.
MODELPRICEWATCH.COM · 2026-10-17
Cost calculator for this use casemonthly cost, top 3 models
- 1 Llama 4 Scout
- $—
- 2 Gemini 3.1 Pro
- $—
- 3 GPT-6 Luna
- $—
Full ranking — top 20 models
list prices, USD per 1M tokens| Model | Blended* | Input | Output | Context | Provider |
|---|---|---|---|---|---|
| 1Llama 4 Scout | $0.168 | $0.110 | $0.340 | 10M | Meta |
| 2Gemini 3.1 Pro | $4.50 | $2.00 | $12.00 | 2M | |
| 3GPT-6 Luna | $0.200 | $0.100 | $0.500 | 1M | OpenAI |
| 4GPT-5.6 Luna | $0.450 | $0.200 | $1.20 | 1M | OpenAI |
| 5GPT-6.1 Sol | $4.00 | $2.00 | $10.00 | 1M | OpenAI |
| 6GPT-6 Sol | $4.00 | $2.00 | $10.00 | 1M | OpenAI |
| 7GPT-5.6 Terra | $4.50 | $2.00 | $12.00 | 1M | OpenAI |
| 8GPT-5.6 Sol | $8.00 | $4.00 | $20.00 | 1M | OpenAI |
| 9GPT-5.5 | $11.25 | $5.00 | $30.00 | 1M | OpenAI |
| 10GPT-6 Astra | $20.00 | $10.00 | $50.00 | 1M | OpenAI |
| 11GPT-5.4 Pro | $67.50 | $30.00 | $180.00 | 1M | OpenAI |
| 12GPT-5.5 Pro | $67.50 | $30.00 | $180.00 | 1M | OpenAI |
| 13Gemini 3 Flash Preview | $1.13 | $0.500 | $3.00 | 1M | |
| 14Hy4 preview | $1.25 | $0.834 | $2.50 | 1M | Tencent |
| 15Muse Spark 1.1 | $2.00 | $1.25 | $4.25 | 1M | Meta |
| 16Muse Spark 1.2 | $2.00 | $1.25 | $4.25 | 1M | Meta |
| 17Muse Spark 1.3 | $2.00 | $1.25 | $4.25 | 1M | Meta |
| 18Gemini 4 Argon | $4.00 | $2.00 | $10.00 | 1M | |
| 19Ember-1 | $6.00 | $3.00 | $15.00 | 1M | Fireworks |
| 20Kimi K3 | $6.00 | $3.00 | $15.00 | 1M | Moonshot |
Recent price movement in this ranking
price-only deltas · logged by the daily scan3 of the top 20 long context models have re-priced since we began tracking · last checked .
| Model | Changes | Latest move | Provider |
|---|---|---|---|
| GPT-5.6 Sol | 1 | price cut on : $5.00/$30.00 → $4.00/$20.00 /Mtok | OpenAI |
| GPT-5.6 Luna | 1 | price cut on : $1.00/$6.00 → $0.200/$1.20 /Mtok | OpenAI |
| GPT-5.6 Terra | 1 | price cut on : $2.50/$15.00 → $2.00/$12.00 /Mtok | OpenAI |
Most recently, GPT-5.6 Sol cut its price on — a sign pricing in this category is still moving, so re-check before committing to a long-term choice. See all recent price moves →
How models are selected
Models with 100K+ token context windows, sorted by context size (largest first); models tied on context size list the maker's own row first, then cheapest blended price.
Prices are per million tokens (Mtok), sourced directly from — and linked to — official provider pricing pages. "Blended cost" is (3×input + 1×output) ÷ 4 — weighted toward input because real workloads read far more tokens than they generate.