Prices as of Nov 1, 2026

Which AI model for long documents and reports?

Contracts, reports and manuals of 100 pages or more, read in one request to summarize, compare or answer questions.

What matters for this task

  • A context window that holds the whole document
  • Long-context surcharges: some models raise the price above a size threshold
  • Careful reading: answers grounded in the text, not invented

Typical workload

200 requests/day · 150K in · 2K out

Adjust in the cost calculator

Shortlist

9 models meet the requirements, ranked by monthly cost for this workload.

ModelArena scoreClassContextImagesInput $/1MOutput $/1MMonthly
Qwen3.8-27B Lowest cost 1,436 Mid 262K ✓ $0.15 $1.88 $152
Gemini 3.8 Flash Promo 1,496 Workhorse 1.05M ✓ $0.75 $3.75 $709
GPT-6.1 Terra — Mid 1.05M ✓ $1.00 $5.00 $945
Grok 4.7 1,441 Flagship 500K ✓ $2.00 $6.00 $1,854
Claude Sonnet 5.5 1,477 Balanced 1M ✓ $2.00 $10.00 $1,890
GPT-6.1 Sol 1,481 Balanced 1.05M ✓ $2.00 $10.00 $1,890
Gemini 4 Argon Promo 1,520 Flagship 1.05M ✓ $2.00 $10.00 $1,890
Gemini 3.1 Pro 1,487 Preview 1.05M ✓ $2.00 $12.00 $1,908
Claude Opus 5.5 1,509 Flagship 1M ✓ $4.00 $20.00 $3,780

— in a score column = not rated on that leaderboard yet.

Arena score: LMArena (text, style control), from human votes, published Oct 28, 2026, CC BY 4.0.

Quality tests

Our side-by-side tests for this task are in progress. Until they are published, run 10 to 20 of your own real examples on two or three candidates before you choose.

Independent leaderboards: LMArena · Artificial Analysis

How this list is built: models in the classes suited to the task that meet its hard requirements (image input, context size, open weights), ranked by price. A lower price does not mean better quality.