Claude Opus 5.5 and what to use instead
For summarising documents cheaply, Claude Opus 5.5 scores 97 and costs $22.00 per 1,000 summaries. Here’s what beats it on price, on quality, or on privacy.
Cheaper at similar quality
At least 30% cheaper and within 5 points.
Gemini 4 ArgonGoogleAbout 50% cheaper per summary, and 1 points weaker.$11.00 per 1,000 summaries · score 96Compare side by side →
Better at a similar price
At least 5 points stronger and no more than 20% dearer.
Nothing we track fits this today.
Open weights you can host
Ranked by value: quality for the money.
GLM-5.3-FlashZ.ai · open weightsAbout 97% cheaper per summary, and 42 points weaker.$0.75 per 1,000 summaries · score 55Compare side by side →
GLM-5.3Z.ai · open weightsAbout 69% cheaper per summary, and 36 points weaker.$6.92 per 1,000 summaries · score 61Compare side by side →
Kimi K3Moonshot AI · open weightsAbout 25% cheaper per summary, and 33 points weaker.$16.50 per 1,000 summaries · score 65Compare side by side →
Scores are provisional (Arena and Epoch AI) and prices are list prices. Rankings never take money into account. Thresholds are in the methodology.