Model comparison
Amazon Nova 2 Pro vs Grok 4.5
Amazon against xAI, compared on context, price, and verified benchmark results.
Catalog record checked September 5, 2026Individual provider fields may changeEvidence confidence: High — see receipts below
Amazon
Amazon Nova 2 Pro
Balanced
xAI
Grok 4.5
Balanced
| Specification | Amazon Nova 2 Pro | Grok 4.5 |
|---|---|---|
| Provider | Amazon | xAI |
| Tier | Balanced | Balanced |
| Context window | Winner: 1M | 500K |
| Max output | Not verifiedUnverified | 131K |
| Input / 1M tokens | Winner: $1.25 | $2 |
| Output / 1M tokens | $10 | Winner: $6 |
| Weights | Closed | Closed |
| Parameters | Not disclosedUnverified | Not disclosedUnverified |
| Reasoning levels | low, medium, high | low, medium, high |
| Modalities | text, image, video | text, image |
| API model id | amazon.nova-2-pro-preview-20251202-v1:0 | grok-4.5 |
| Released | December 2, 2025 | July 8, 2026 |
| Artificial Analysis Intelligence Index (2026-08-14) | 44 | Not verifiedUnverified |
| Artificial Analysis Intelligence Index [high] (2026-08-14) | Not verifiedUnverified | 56 |
| Terminal-Bench 2.1 (2026-07-16) | Not verifiedUnverified | 83.3 |
| DeepSWE 1.1 (2026-07) | Not verifiedUnverified | 54 |
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
- 2026-08-14: 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).
- 2026-07-16: xAI — Introducing Grok 4.5 (vendor; Datacurve-run)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.
- 2026-07: Google DeepMind 3.6 Flash evaluation report (independent tabulation; conflicts with xAI's 53 — both preserved)Agentic software engineering: pass@1 on real repo tasks with reported cost per completed task. Comparability: directly comparable
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). · Grok 4.5: $2/$6 per MTok (<200K prompt); $4/$12 (≥200K). Cached input $0.30/MTok.
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).
Grok 4.5
Grok 4.5 is xAI's balanced model with a 500K context and real-time X integration.
Best for
- Real-time data queries
- Technical tasks
- Cost-sensitive reasoning
Watch out
A step behind Grok 4.6; 500K context is smaller than the 1M-class models.
When the cheaper one wins
Grok 4.5 is cheaper on output at $6 per million tokens against $10 for Amazon Nova 2 Pro — about 1.7×. 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.
- 3/5 core specs verified on both sides — Not published for at least one side: max output, parameter count.
- 1 shared named benchmark with differing scores — Measured on: Artificial Analysis Intelligence Index.
- Verified within the last 90 days — Newest catalog check was 6 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)
- Grok 4.5: xAI — Introducing Grok 4.5 (public launch 8 Jul 2026; formal announcement 16 Jul) (accessed 2026-08-29)
- Grok 4.5: xAI pricing (grok-4.5 $2/$6, 500K) (accessed 2026-08-29)
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- Amazon Nova 2 Pro vs Cohere Command A+
- Amazon Nova 2 Pro vs DeepSeek R1
- Amazon Nova 2 Pro vs DeepSeek V4 Flash
Diving deeper on one model? Amazon Nova 2 Pro · Grok 4.5
Common questions
Amazon Nova 2 Pro vs Grok 4.5
Answered from the verified figures on this page rather than general guidance.
Is Amazon Nova 2 Pro or Grok 4.5 cheaper for input?
Amazon Nova 2 Pro is cheaper at $1.25 per million input tokens, against $2 for Grok 4.5 — roughly 1.6× 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). Grok 4.5 has tiered pricing: $2/$6 per MTok (<200K prompt); $4/$12 (≥200K). Cached input $0.30/MTok.
Is Amazon Nova 2 Pro or Grok 4.5 cheaper for output?
Grok 4.5 is cheaper at $6 per million output tokens, against $10 for Amazon Nova 2 Pro — roughly 1.7× 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). Grok 4.5 has tiered pricing: $2/$6 per MTok (<200K prompt); $4/$12 (≥200K). Cached input $0.30/MTok.
Which has the larger context window, Amazon Nova 2 Pro or Grok 4.5?
Amazon Nova 2 Pro accepts 1M tokens against 500K for Grok 4.5. This only matters if you routinely send very long documents or large codebases.
Do Amazon Nova 2 Pro and Grok 4.5 support the same reasoning levels?
Yes — both accept the same effort settings: "low", "medium", "high". Higher effort costs more and takes longer, so start low and raise it only where output quality actually improves.
Should I use Amazon Nova 2 Pro or Grok 4.5?
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; Grok 4.5 suits real-time data queries.
Next step
Choosing between them
The verified figures that separate this pair, computed from the catalog rather than restated boilerplate.
- Input price: Amazon Nova 2 Pro costs $1.25 per 1M tokens versus $2 for Grok 4.5 — a 1.6x difference at the headline tier.
- Context: Amazon Nova 2 Pro takes 1M against 500K for Grok 4.5 — only decisive if your prompts approach the smaller window.
- Measured capability: Grok 4.5 leads Artificial Analysis Intelligence Index 56 to 44 (measured 2026-08-14).
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