GLM-4.5-Flash vs LFM2.5 8B A1B
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
GLM-4.5-FlashFree · limited-time
by Z.AI
|
by Together
|
|---|---|---|
| Overview | ||
| Status | Current budget Open weights | Current budget Open weights |
| Released | ||
| Pricing per million tokens | ||
| Input | $0/Mtok | $0.030/Mtok |
| Output | $0/Mtok | $0.120/Mtok |
| Blended avg | $0/Mtok | $0.052/Mtok |
| Price basis | Limited-time free tier ($0/$0). Z.AI has not published an end date — verify current pricing before relying on $0. | — |
| Specifications | ||
| Context window | 128K tokens | 33K tokens |
| Parameters | Proprietary | 8.5B (A1B) |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
text
|
text
|
| Benchmarks sources: public leaderboards / Artificial Analysis | ||
| Independent composite scores each on its own scale — not part of the average above | ||
| AA-Omniscience Index (−100–100) | — | -33.2 |
| Providers | ||
| Available from |
Z.AI — $0/Mtok
|
Together — $0.030/$0.120/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | GLM-4.5-Flash | LFM2.5 8B A1B | Savings |
|---|---|---|---|
| 1M tokens | $0 | $0.05 | $0.05 (95.2%) |
| 10M tokens | $0 | $0.53 | $0.53 (101%) |
| 100M tokens | $0 | $5.25 | $5.25 (100%) |
| 1000M tokens | $0 | $52.5 | $52.5 (100%) |
When to pick which
distilled from the pricing and spec data above- cost dominates: free at list price vs $0.052 — 100% less on the same 50/50 token mix
- you need the longer context: 128K tokens vs 33K (3.9×)
- this pairing gives LFM2.5 8B A1B no edge on price, context, cache discount, or measured performance — pick it only for qualitative fit (ecosystem, compliance, model behavior on your prompts)
The cheaper option here — GLM-4.5-Flash costs $0/Mtok blended on Z.AI.
Summary
GLM-4.5-Flash by Z.AI costs $0/Mtok input, with a 128K-token context window. It supports text input.
LFM2.5 8B A1B by Together costs $0.030/Mtok input and $0.120/Mtok output, with a 33K-token context window. It supports text input.
At list price, GLM-4.5-Flash is currently free (LFM2.5 8B A1B costs $0.052/Mtok blended); free tiers are usually rate-limited.It also has a larger context window.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.