Compare AI models

Decision facts

• GLM 4.5 Air is #125; GLM 5.3 is #11 on the same current language board.
• Index scores are 46.7 for GLM 4.5 Air and 80.0 for GLM 5.3. Their published uncertainty intervals do not overlap, but the aggregate Index does not predict performance on every task; compare the relevant benchmark configurations before choosing.
• Both positions use Measured evidence.
• Listed output price per 1M tokens is $0.85 for GLM 4.5 Air and $4.40 for GLM 5.3. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $0.69 for GLM 4.5 Air versus $5.00 for GLM 5.3. GLM 4.5 Air costs 86.3% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
• Published context is 131,072 tokens for GLM 4.5 Air and 1,048,576 for GLM 5.3.
• Weight access differs: GLM 4.5 Air is open; GLM 5.3 is restricted.
• ModelCap currently lists 3 providers for GLM 4.5 Air and 32 for GLM 5.3.

These are separate published fields, not a synthetic winner. ModelCap does not collapse price, access, context, and capability evidence into a hidden recommendation score.