Noometry

Model comparison

Claude Opus 5.5 vs Nova Premier 1.0

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.3 on the Noometry Index. Nova Premier 1.0 costs 1.6× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Last verified . 0 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Nova Premier 1.0 Amazon

38.3

Rank #189 Confirmed

Summary

  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 33.8.
  • Nova Premier 1.0 is cheaper at $2.50 / $12.50 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.

Side by side

Claude Opus 5.5Nova Premier 1.0
ProviderAnthropicAmazon
Noometry Index68.638.3
Released2026-09-222025-04-30
WeightsProprietaryProprietary
Context window1M1M
Max output128K10K
Input $ / M tokens$4$2.50
Output $ / M tokens$20$12.50
Results tracked446

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Category by category

Coding Not comparable

Claude Opus 5.5: 71.9 (#3), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
LMArena Coding1547—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Nova Premier 1.0: 23.0 (#185)

BenchmarkClaude Opus 5.5Nova Premier 1.0
ARC-AGI-293.3%—
Kagi LLM Benchmark—44.8%
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
EBR-Bench71.4%—
LMArena Hard Prompts1535—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
Epoch Capabilities Index167.33—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Nova Premier 1.0: 33.8 (#199)

BenchmarkClaude Opus 5.5Nova Premier 1.0
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
Omni-MATH—35%
LMArena Math1506—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Nova Premier 1.0: 35.8 (#180)

BenchmarkClaude Opus 5.5Nova Premier 1.0
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
MMLU-Pro—72.6%
GPQA (HELM)—51.8%
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), Nova Premier 1.0: 66.8 (#204)

BenchmarkClaude Opus 5.5Nova Premier 1.0
IFEval—80.3%
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Longer Query1532—

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), Nova Premier 1.0: 51.0 (#178)

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
WildBench—78.8%
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than Nova Premier 1.0?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 38.3 on the Noometry Index. Nova Premier 1.0 costs 1.6× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5.5 or Nova Premier 1.0?

Nova Premier 1.0 is cheaper. It lists at $2.50 per million input tokens and $12.50 per million output tokens; Claude Opus 5.5 lists at $4 and $20.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Claude Opus 5.5 and Nova Premier 1.0 share?

0 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Nova Premier 1.0 has 6.

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