Model comparison
Amazon Nova 2 Pro vs GLM 5.3 Flash
Amazon against Z.ai, compared on context, price, and verified benchmark results.
Catalog record checked September 4, 2026Individual provider fields may changeEvidence confidence: High — see receipts below
Amazon
Amazon Nova 2 Pro
Balanced
Z.ai
GLM 5.3 Flash
Balanced · Open weights
| Specification | Amazon Nova 2 Pro | GLM 5.3 Flash |
|---|---|---|
| Provider | Amazon | Z.ai |
| Tier | Balanced | Balanced |
| Context window | 1M | Winner: 1.05M |
| Max output | Not verifiedUnverified | 131K |
| Input / 1M tokens | $1.25 | Winner: $0.15 |
| Output / 1M tokens | $10 | Winner: $0.50 |
| Weights | Closed | Open |
| Parameters | Not disclosedUnverified | 320B total / 18B active (MoE) |
| Reasoning levels | low, medium, high | Not verifiedUnverified |
| Modalities | text, image, video | text, image, video |
| License | Not disclosedUnverified | MIT |
| API model id | amazon.nova-2-pro-preview-20251202-v1:0 | Not publishedUnverified |
| Released | December 2, 2025 | August 26, 2026 |
| Artificial Analysis Intelligence Index (2026-08-14) | 44 | Winner: 57 |
| SWE-bench Verified (2026-09-01) | Not verifiedUnverified | 92 |
| Terminal-Bench 2.1 (2026-08) | Not verifiedUnverified | 84.3 |
| DeepSWE 1.1 (2026-08) | Not verifiedUnverified | 63.4 |
| Humanity's Last Exam (2026-08) | Not verifiedUnverified | 55.3 |
Prices are USD per million tokens at standard rates, excluding batch and caching discounts. Bold indicates the better figure where one is objectively better. Values we could not confirm from the provider are shown as “Not verified” rather than estimated.
Benchmark receipts
- 2026-09-01: vals.ai SWE-bench Verified leaderboard (independent, mini-swe-agent bash-only); not published by Z.aiReal GitHub issue resolution: does the model's patch pass the hidden tests. Comparability: comparable with caveat — Post-audit vendor claims and pre-audit scores sit on different task trust levels; scaffolding (agent harness, compute budget) also dominates results. Never aggregate across scaffolds.
- 2026-08-26: Artificial AnalysisComposite index blending reasoning, knowledge, and coding evals into one 0–100 score. Comparability: directly comparable — AA occasionally rebaselines the index scale between snapshots — a score captured on one date is only comparable to same-snapshot scores (check measuredAt).
- 2026-08: Z.ai GLM-5.3-Flash blog (vendor, mini-swe-agent, 400K context)Agentic software engineering: pass@1 on real repo tasks with reported cost per completed task. Comparability: directly comparable
- 2026-08: GLM-5.3-Flash HF model card (vendor, with tools, full set)Agentic terminal work: multi-step tasks executed in a sandboxed shell environment. Comparability: comparable with caveat — Scores across Terminal-Bench major versions (v1 vs v2) are NOT comparable; harness configuration (container, time limits) also shifts results.
Pricing tiers: Amazon Nova 2 Pro: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). · GLM 5.3 Flash: $0.15/$0.50 per MTok is the standard first-party and third-party rate (Z.ai docs; GMI, Novita, Together). A 50% promo tier runs $0.075/$0.25 — confirm which rate your account quotes.
Amazon Nova 2 Pro
Nova 2 Pro is Amazon's closed Bedrock flagship with a 1M-token context and multimodal input.
Best for
- AWS-native workloads
- Multimodal
- Long-context
Watch out
Bedrock-only (closed) and still preview — pricing may change at GA. Older Nova siblings are sunsetting (Premier and original Sonic EOL 2026-09-14, Canvas/Reel 2026-09-30).
GLM 5.3 Flash
GLM 5.3 Flash is Z.ai's natively multimodal open-weight workhorse — 1M context, hybrid sparse/linear attention, near-flagship Intelligence Index at a fraction of the cost.
Best for
- Cost-efficient long-context
- Multimodal input
- Coding agents
Watch out
Self-hosting needs ~186GB GPU memory at 4-bit (multi-GPU). Third-party hosts charge more than Z.ai's own API.
When the cheaper one wins
GLM 5.3 Flash is cheaper on output at $0.50 per million tokens against $10 for Amazon Nova 2 Pro — about 20×. Use the cheaper tier for classification, extraction, summarisation, and any task where the expensive model’s extra score does not change the accepted output. The expensive one only pays if your hardest task actually fails on the cheap tier. These are standard-tier API rates, excluding batch and cache discounts.
Run the model pickerEvidence confidence: High
How strong and complete the evidence behind this comparison is — not a prediction of which model is better.
- Pricing verified on both sides — Input and output rates are verified for both models.
- 2/5 core specs verified on both sides — Not published for at least one side: max output, parameter count, reasoning levels.
- 1 shared named benchmark with differing scores — Measured on: Artificial Analysis Intelligence Index.
- Verified within the last 90 days — Newest catalog check was 7 days ago.
- Both models carry source citations — Each side has at least two catalog sources on record.
Source receipts
Each catalog figure was checked against the provider or an independent second source on the date shown.
- Amazon Nova 2 Pro: AWS Bedrock offer file (Nova 2.0 Pro standard $1.25/$10, published 2026-09-01) (accessed 2026-09-04)
- Amazon Nova 2 Pro: DeepLearning.AI — Nova 2 family ($1.25/$0.31/$10) (accessed 2026-09-04)
- Amazon Nova 2 Pro: AWS — Nova 2 release notes (still preview) (accessed 2026-09-04)
- GLM 5.3 Flash: Z.ai — GLM-5.3-Flash announcement (accessed 2026-08-29)
- GLM 5.3 Flash: getdeploying — GLM-5.3-Flash reference (accessed 2026-08-29)
- GLM 5.3 Flash: GMI Cloud — GLM-5.3-Flash analysis (accessed 2026-08-29)
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Diving deeper on one model? Amazon Nova 2 Pro · GLM 5.3 Flash
Common questions
Amazon Nova 2 Pro vs GLM 5.3 Flash
Answered from the verified figures on this page rather than general guidance.
Is Amazon Nova 2 Pro or GLM 5.3 Flash cheaper for input?
GLM 5.3 Flash is cheaper at $0.15 per million input tokens, against $1.25 for Amazon Nova 2 Pro — roughly 8.3× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Amazon Nova 2 Pro has tiered pricing: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). GLM 5.3 Flash has tiered pricing: $0.15/$0.50 per MTok is the standard first-party and third-party rate (Z.ai docs; GMI, Novita, Together). A 50% promo tier runs $0.075/$0.25 — confirm which rate your account quotes.
Is Amazon Nova 2 Pro or GLM 5.3 Flash cheaper for output?
GLM 5.3 Flash is cheaper at $0.50 per million output tokens, against $10 for Amazon Nova 2 Pro — roughly 20× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Amazon Nova 2 Pro has tiered pricing: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). GLM 5.3 Flash has tiered pricing: $0.15/$0.50 per MTok is the standard first-party and third-party rate (Z.ai docs; GMI, Novita, Together). A 50% promo tier runs $0.075/$0.25 — confirm which rate your account quotes.
Which has the larger context window, Amazon Nova 2 Pro or GLM 5.3 Flash?
GLM 5.3 Flash accepts 1.05M tokens against 1M for Amazon Nova 2 Pro. This only matters if you routinely send very long documents or large codebases.
Should I use Amazon Nova 2 Pro or GLM 5.3 Flash?
Both sit in the balanced tier, so the choice usually comes down to price and context rather than capability. Amazon Nova 2 Pro suits aws-native workloads; GLM 5.3 Flash suits cost-efficient long-context.
Can I self-host Amazon Nova 2 Pro or GLM 5.3 Flash?
GLM 5.3 Flash publishes open weights, but self-hosting and third-party provider access depend on the licence, hardware, serving support, and availability. Amazon Nova 2 Pro is a closed model whose supported access paths are controlled by its provider.
Next step
Choosing between them
The verified figures that separate this pair, computed from the catalog rather than restated boilerplate.
- Input price: GLM 5.3 Flash costs $0.15 per 1M tokens versus $1.25 for Amazon Nova 2 Pro — a 8.3x difference at the headline tier.
- Context: GLM 5.3 Flash takes 1.05M against 1M for Amazon Nova 2 Pro — only decisive if your prompts approach the smaller window.
- Measured capability: GLM 5.3 Flash leads Artificial Analysis Intelligence Index 57 to 44 (measured 2026-08-14).
- Deployment: GLM 5.3 Flash publishes weights you can self-host; the other is API-only.
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