Nova 2 Pro vs Nemotron VoiceChat vs GLM-4.5-Flash
Nova 2 Pro comes out ahead, 86 to 65 and 65 on our weighted score.
- Our pick
AmazonNova 2 Pro
86/100- ECI—
- PriceFree / Free
- Context1M
NVIDIANemotron VoiceChat
65/100- ECI—
- PriceFree / Free
- Context128K
Z.ai (Zhipu)GLM-4.5-Flash
65/100- ECI—
- PriceFree / Free
- Context131K
Nova 2 Pro is our pick
Nova 2 Pro is the better all-round choice, scoring 86/100 against GLM-4.5-Flash (65) and Nemotron VoiceChat (65). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceSame priceNova 2 Pro Free · Nemotron VoiceChat Free · GLM-4.5-Flash Free per 1M tokens (3:1 blend)
- Longest contextNova 2 ProNova 2 Pro 1,000,000 · GLM-4.5-Flash 131,072 · Nemotron VoiceChat 128,000 tokens
- Widest inputsNova 2 ProNova 2 Pro: Text, Images, PDFs, Video · Nemotron VoiceChat: Text, Audio · GLM-4.5-Flash: Text
- Self-hostingNemotron VoiceChatPublishes downloadable weights
| Measure | Weight | Nova 2 Pro | Nemotron VoiceChat | GLM-4.5-Flash |
|---|---|---|---|---|
| Price | 50% | 100 | 100 | 100 |
| Inputs & features | 30% | 80 | 35 | 35 |
| Context window | 20% | 60 | 24 | 24 |
| Overall | 100% | 86/100 | 65/100 | 65/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Nova 2 ProAmazon | Nemotron VoiceChatNVIDIA | GLM-4.5-FlashZ.ai (Zhipu) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | Free | Free | Free |
| Output | Free | Free | Free |
| Cached input | — | — | — |
| Blended (3:1) | Free | Free | Free |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Nova API | Official Nvidia API | Official Z.AI API |
| Limits | |||
| Context window | 1,000,000 tokens (best) | 128,000 tokens | 131,072 tokens |
| Max output | 64,000 tokens | 8,192 tokens | 98,304 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | No |
| PDFs | Yes | No | No |
| Audio | No | Yes | No |
| Video | Yes | No | No |
| Reasoning | Yes | No | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | No | No |
| Availability | |||
| Weights | Proprietary | Open | Proprietary |
| API model ID | nova-2-pro-v1 | nvidia/nemotron-voicechat | glm-4.5-flash |
| API providers | 1 | 1 | 4 (best) |
| Released | Dec 3, 2025 | Mar 16, 2026 | Jul 28, 2025 |
| Knowledge cutoff | — | — | Apr 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Nova 2 ProFree
- Nemotron VoiceChatFree
- GLM-4.5-FlashFree
Which should you choose?
Which is better: Nova 2 Pro, Nemotron VoiceChat or GLM-4.5-Flash?
Nova 2 Pro is the better all-round choice, scoring 86/100 against GLM-4.5-Flash (65) and Nemotron VoiceChat (65). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Nova 2 Pro, Nemotron VoiceChat or GLM-4.5-Flash?
Nova 2 Pro, Nemotron VoiceChat and GLM-4.5-Flash cost the same: Free input / Free output per million tokens.
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Nova 2 Pro has not been scored yet, Nemotron VoiceChat has not been scored yet and GLM-4.5-Flash has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Nova 2 Pro, Nemotron VoiceChat and GLM-4.5-Flash yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Nova 2 Pro has the largest context window at 1,000,000 tokens, against 131,072 for GLM-4.5-Flash and 128,000 for Nemotron VoiceChat. Maximum output per response: Nova 2 Pro up to 64,000, Nemotron VoiceChat up to 8,192, GLM-4.5-Flash up to 98,304 tokens.
Which can read images, PDFs, audio or video?
Nova 2 Pro accepts text, images, PDFs and video; Nemotron VoiceChat accepts text and audio; GLM-4.5-Flash accepts text. Nova 2 Pro handles the widest range of inputs.
Are any of these open source?
Nemotron VoiceChat publishes its weights and can be self-hosted; Nova 2 Pro and GLM-4.5-Flash is proprietary.
Which is newer?
Nemotron VoiceChat is the newest, released Mar 16, 2026. Nova 2 Pro came out Dec 3, 2025; GLM-4.5-Flash came out Jul 28, 2025. Knowledge cutoff: GLM-4.5-Flash Apr 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
