Reka Flash vs GLM-4.5
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
by Reka
|
by Z.AI
|
|---|---|---|
| Overview | ||
| Status | Current mid tier | Current mid tier Open weights |
| Released | Jun 1, 2025 | Jan 1, 2025 |
| Pricing per million tokens | ||
| Input | $0.800/Mtok | $0.600/Mtok |
| Output | $2.00/Mtok | $2.20/Mtok |
| Blended avg | $1.40/Mtok | $1.40/Mtok |
| Cached input | — | $0.110/Mtok |
| Specifications | ||
| Context window | 128K tokens | 128K tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimagevideoaudio
|
text
|
| Benchmarks sources: LMSYS Chatbot Arena (2025-07-15 archive), Reka tech report / LMSYS Chatbot Arena (UC Berkeley) | ||
| Independent composite scores measured for both models — each on its own scale | ||
| LMSYS Chatbot Arena | 1220.6 ELO | 1410.7 ELO |
| Per-benchmark results published for Reka Flash only — no independent per-benchmark scores exist for GLM-4.5 yet | ||
| HumanEval | 72 vendor | — |
| Providers | ||
| Available from |
Reka — $0.800/$2.00/Mtok
|
Z.AI — $0.600/$2.20/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Reka Flash | GLM-4.5 | Savings |
|---|---|---|---|
| 1M tokens | $1.4 | $1.4 | $0 (0%) |
| 10M tokens | $14 | $14 | $0 (0%) |
| 100M tokens | $140 | $140 | $0 (0%) |
| 1000M tokens | $1400 | $1400 | $0 (0%) |
Try Reka Flash on Reka
The cheaper option here — Reka Flash costs $1.40/Mtok blended on Reka.
Summary
Reka Flash by Reka costs $0.800/Mtok input and $2.00/Mtok output, with a 128K-token context window. It supports text, image, video, audio input.
GLM-4.5 by Z.AI costs $0.600/Mtok input and $2.20/Mtok output, with a 128K-token context window. It supports text input.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.
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