Noometry

Model comparison

Claude Opus 5.5 vs Nova Premier 1.0

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 37.7 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

68.5

Rank #3 Confirmed

Nova Premier 1.0 Amazon

37.7

Rank #185 Confirmed

Summary

  • The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 31.5.
  • 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 Index68.537.7
Released2026-09-222025-04-30
WeightsProprietaryProprietary
Context window1M1M
Max output128K10K
Input $ / M tokens$4$2.50
Output $ / M tokens$20$12.50
Results tracked356

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Category by category

Coding Not comparable

Claude Opus 5.5: 71.4 (#1), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
SciCode66.9%—
LMArena Coding1545—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#13), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Nova Premier 1.0: 22.3 (#182)

BenchmarkClaude Opus 5.5Nova Premier 1.0
ARC-AGI-292.5%—
Kagi LLM Benchmark—44.8%
NYT Connections (extended)88.5%—
ARC-AGI-197.5%—
CritPt31.7%—
EBR-Bench71.4%—
LMArena Hard Prompts1545—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 92.4 (#2), Nova Premier 1.0: 31.5 (#194)

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%

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.6 (#9), Nova Premier 1.0: 35.4 (#176)

BenchmarkClaude Opus 5.5Nova Premier 1.0
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
MMLU-Pro—72.6%
GPQA (HELM)—51.8%
LMArena Expert1564—

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.8 (#1), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Non-English1513—
LMArena Chinese1572—
LMArena Russian1532—

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.1 (#2), Nova Premier 1.0: 66.9 (#201)

BenchmarkClaude Opus 5.5Nova Premier 1.0
IFEval—80.3%
LMArena Instruction Following1535—

Long Context Not comparable

Claude Opus 5.5: 47.3 (#18), Nova Premier 1.0: —

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Longer Query1540—

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.7 (#3), Nova Premier 1.0: 51.0 (#174)

BenchmarkClaude Opus 5.5Nova Premier 1.0
LMArena Text1518—
LMArena Creative Writing1538—
EQ-Bench Creative Writing2050—
WildBench—78.8%
LMArena Multi-Turn1520—

Frequently asked questions

Is Claude Opus 5.5 better than Nova Premier 1.0?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 37.7 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 35 scored results on Noometry and Nova Premier 1.0 has 6.

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