Claude Opus 5 vs Nano Banana 2 (Gemini 3.1 Flash Image)
Nano Banana 2 (Gemini 3.1 Flash Image) costs 8.3x less per output token than Claude Opus 5 ($3.00 vs $25.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
Claude Opus 5Anthropic
- Coding
- 83.0
- Overall
- 50.8
- Output $/M
- $25.00
Nano Banana 2 (Gemini 3.1 Flash Image)Google
- Coding
- No data
- Overall
- No data
- Output $/M
- $3.00
vs $25.00 vs $3.00 per 1M output tokens. Nano Banana 2 (Gemini 3.1 Flash Image) is 8.3x cheaper.
Claude Opus 5 or Nano Banana 2 (Gemini 3.1 Flash Image): which to pick
Only Claude Opus 5 has a coding score, 83.0 on the Vibe Coding Index; Nano Banana 2 (Gemini 3.1 Flash Image) has none, so the two cannot be ranked on coding.
Pick Nano Banana 2 (Gemini 3.1 Flash Image) for output tokens 8.3x cheaper ($3.00 vs $25.00 per million).
Model AClaude Opus 5Anthropic83.0/1006 independent benchmarks$1.33 per solved taskModel BNano Banana 2 (Gemini 3.1 Flash Image)GoogleNot benchmarkedNo coding benchmarkNo cost per solved task
No benchmark has tested both yet. Claude Opus 5 has results on LiveBench coding, LMArena WebDev and AA Coding Index; Nano Banana 2 (Gemini 3.1 Flash Image) on LMArena Image Edit. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Claude Opus 5 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Claude Opus 5 has a AA Intelligence Index result, 50.8.
Directional only
Agentic work
AA Agentic Index
No call
Only Claude Opus 5 has a AA Agentic Index result, 56.5.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Opus 5 has a GPQA Diamond result, 93.4%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Opus 5 has a MMLU Pro result, 91.6%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Opus 5 has a Design Arena: websites result, 1309.
Directional only
Long documents
Listed context window
Claude Opus 5
Claude Opus 5 takes 1M tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nano Banana 2 (Gemini 3.1 Flash Image)
Claude Opus 5 $0.018, Nano Banana 2 (Gemini 3.1 Flash Image) $0.0020 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Claude Opus 5 has the number, $1.33.
Directional only
At a glance
- Coding index
- Claude Opus 5 83.0 from 6 benchmarks, Nano Banana 2 (Gemini 3.1 Flash Image) not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Claude Opus 5 $25.00 against Nano Banana 2 (Gemini 3.1 Flash Image) $3.00 per million output tokens, 8.3x apart.
- Context window
- Claude Opus 5 takes 1M tokens, Nano Banana 2 (Gemini 3.1 Flash Image) 131K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index24 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| LiveBench coding | 90.8% | Not measured | Only Claude Opus 5 measured |
| LMArena WebDev | 1689 | Not measured | Only Claude Opus 5 measured |
| AA Coding Index | 78.0 | Not measured | Only Claude Opus 5 measured |
| LiveCodeBench (Vals AI) | 89.0% | Not measured | Only Claude Opus 5 measured |
| SWE-bench Verified (Vals AI) | 97.0% | Not measured | Only Claude Opus 5 measured |
| Terminal-Bench 4 (Vals AI) | 53.5% | Not measured | Only Claude Opus 5 measured |
| Vibe Code Bench (Vals AI) | 88.4% | Not measured | Only Claude Opus 5 measured |
| Code migration (Vals AI) | 57.5% | Not measured | Only Claude Opus 5 measured |
| ProgramBench (Vals AI) | 3.0% | Not measured | Only Claude Opus 5 measured |
| IOI (Vals AI) | 84.3% | Not measured | Only Claude Opus 5 measured |
| Terminal-Bench 2.1 (Vals AI) | 84.6% | Not measured | Only Claude Opus 5 measured |
| Vibe Code Bench 1-100 (Vals AI) | 28.5% | Not measured | Only Claude Opus 5 measured |
| SkillsBench (Vals AI) | 60.4% | Not measured | Only Claude Opus 5 measured |
| CyberBench (Vals AI) | 65.4% | Not measured | Only Claude Opus 5 measured |
| SciCode | 56.4% | Not measured | Only Claude Opus 5 measured |
| FrontierCode | 53.4% | Not measured | Only Claude Opus 5 measured |
| FrontierSWE | 52.0% | Not measured | Only Claude Opus 5 measured |
| WeirdML | 91.8% | Not measured | Only Claude Opus 5 measured |
| ALE-Bench | 2164.6 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: coding | 1533 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: software and IT | 1527 | Not measured | Only Claude Opus 5 measured |
| LMArena WebDev: React | 1711 | Not measured | Only Claude Opus 5 measured |
| LMArena WebDev: HTML | 1680 | Not measured | Only Claude Opus 5 measured |
| LMArena WebDev: from an image | 1662 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 14 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| AA Intelligence Index | 50.8 | Not measured | Only Claude Opus 5 measured |
| Epoch Capabilities Index | 163.9 | Not measured | Only Claude Opus 5 measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index27 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| AA Agentic Index | 56.5 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building web apps | 1266 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building full-stack apps | 1306 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building mobile apps | 1348 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building Android apps | 1254 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building Godot games | 1279 | Not measured | Only Claude Opus 5 measured |
| Design Arena: agents building games | 1261 | Not measured | Only Claude Opus 5 measured |
| Design Arena: PowerPoint slides | 1265 | Not measured | Only Claude Opus 5 measured |
| LiveBench research | 88.9% | Not measured | Only Claude Opus 5 measured |
| LiveBench browser | 84.0% | Not measured | Only Claude Opus 5 measured |
| LiveBench long agentic | 62.1% | Not measured | Only Claude Opus 5 measured |
| SREBench (Vals AI) | 12.2% | Not measured | Only Claude Opus 5 measured |
| Finance Agent (Vals AI) | 58.6% | Not measured | Only Claude Opus 5 measured |
| Tax Agent Bench (Vals AI) | 45.5% | Not measured | Only Claude Opus 5 measured |
| Legal Research Bench (Vals AI) | 55.3% | Not measured | Only Claude Opus 5 measured |
| Excel Modeling Benchmark (Vals AI) | 73.6% | Not measured | Only Claude Opus 5 measured |
| BioMysteryBench (Vals AI) | 79.3% | Not measured | Only Claude Opus 5 measured |
| Terminal-Bench-Science (Vals AI) | 27.1% | Not measured | Only Claude Opus 5 measured |
| Vals Science Index | 47.9% | Not measured | Only Claude Opus 5 measured |
| Time Horizon Index (Vals AI) | 18.8% | Not measured | Only Claude Opus 5 measured |
| CUA-bench (Vals AI) | 9.0% | Not measured | Only Claude Opus 5 measured |
| APEX-Agents | 65.8% | Not measured | Only Claude Opus 5 measured |
| OSWorld 2.0 | 31.4% | Not measured | Only Claude Opus 5 measured |
| BALROG | 63.4% | Not measured | Only Claude Opus 5 measured |
| PostTrainBench | 35.0% | Not measured | Only Claude Opus 5 measured |
| Vending-Bench 2 | $11,182 | Not measured | Only Claude Opus 5 measured |
| LMArena Search | 1242 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 12 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index18 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| GPQA Diamond | 93.4% | Not measured | Only Claude Opus 5 measured |
| LiveBench reasoning | 91.2% | Not measured | Only Claude Opus 5 measured |
| MysteryMechanism (Vals AI) | 37.4% | Not measured | Only Claude Opus 5 measured |
| MMMU Pro (Vals AI) | 89.9% | Not measured | Only Claude Opus 5 measured |
| GPQA Diamond (Artificial Analysis run) | 93.7% | Not measured | Only Claude Opus 5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 54.9% | Not measured | Only Claude Opus 5 measured |
| GPQA Diamond (Epoch AI run) | 93.9% | Not measured | Only Claude Opus 5 measured |
| ARC-AGI | 97.5% | Not measured | Only Claude Opus 5 measured |
| ARC-AGI-2 | 90.4% | Not measured | Only Claude Opus 5 measured |
| SimpleBench | 80.6% | Not measured | Only Claude Opus 5 measured |
| Chess puzzles | 43.0% | Not measured | Only Claude Opus 5 measured |
| Mystery game puzzles | 59.0% | Not measured | Only Claude Opus 5 measured |
| EBR-bench | 45.7% | Not measured | Only Claude Opus 5 measured |
| LMArena Text: hard prompts | 1527 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: expert | 1554 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: hard prompts in English | 1523 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: diagrams | 1348 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: homework | 1338 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 3 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.9% | Not measured | Only Claude Opus 5 measured |
| FrontierMath, tiers 1 to 3 | 85.6% | Not measured | Only Claude Opus 5 measured |
| FrontierMath, tier 4 | 73.2% | Not measured | Only Claude Opus 5 measured |
| ProofBench | 99.0% | Not measured | Only Claude Opus 5 measured |
| LMArena Text: math | 1533 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: mathematical work | 1544 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index11 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| MMLU Pro | 91.6% | Not measured | Only Claude Opus 5 measured |
| LegalBench (Vals AI) | 87.0% | Not measured | Only Claude Opus 5 measured |
| CorpFin (Vals AI) | 73.2% | Not measured | Only Claude Opus 5 measured |
| TaxEval (Vals AI) | 75.1% | Not measured | Only Claude Opus 5 measured |
| MortgageTax (Vals AI) | 72.1% | Not measured | Only Claude Opus 5 measured |
| MedCode (Vals AI) | 63.6% | Not measured | Only Claude Opus 5 measured |
| SimpleQA Verified | 59.9% | Not measured | Only Claude Opus 5 measured |
| LMArena Text: science | 1531 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: medicine and healthcare | 1525 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: legal and government | 1530 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: business and finance | 1501 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 6 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| Design Arena: websites | 1309 | Not measured | Only Claude Opus 5 measured |
| Design Arena: UI components | 1349 | Not measured | Only Claude Opus 5 measured |
| Design Arena: game dev | 1338 | Not measured | Only Claude Opus 5 measured |
| Design Arena: data viz | 1329 | Not measured | Only Claude Opus 5 measured |
| Design Arena: 3D | 1335 | Not measured | Only Claude Opus 5 measured |
| Design Arena: all code categories | 1324 | Not measured | Only Claude Opus 5 measured |
| Design Arena: SVG | 1311 | Not measured | Only Claude Opus 5 measured |
| Design Arena: ASCII art | 1352 | Not measured | Only Claude Opus 5 measured |
| LiveBench design | 83.0% | Not measured | Only Claude Opus 5 measured |
GeneralDirectional onlyPublic boards, shown as published, kept out of the index33 boards measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| LiveBench data analysis | 74.6% | Not measured | Only Claude Opus 5 measured |
| Public Benefits Bench (Vals AI) | 76.9% | Not measured | Only Claude Opus 5 measured |
| SAGE (Vals AI) | 49.4% | Not measured | Only Claude Opus 5 measured |
| MedScribe (Vals AI) | 91.0% | Not measured | Only Claude Opus 5 measured |
| Vals Multimodal Index | 73.9% | Not measured | Only Claude Opus 5 measured |
| Long context reasoning (AA-LCR) | 82.0% | Not measured | Only Claude Opus 5 measured |
| DTBench | 97.9% | Not measured | Only Claude Opus 5 measured |
| LMCA | 64.5% | Not measured | Only Claude Opus 5 measured |
| Furniture assembly | 60.8% | Not measured | Only Claude Opus 5 measured |
| LMArena Text | 1509 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: instruction following | 1518 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: creative writing | 1493 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision | 1320 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: English | 1508 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: non-English | 1502 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Chinese | 1573 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: German | 1527 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Japanese | 1520 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Korean | 1517 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: French | 1519 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Spanish | 1523 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Russian | 1507 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: Polish | 1522 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: multi-turn | 1500 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: longer queries | 1517 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: writing and language | 1499 | Not measured | Only Claude Opus 5 measured |
| LMArena Text: entertainment and media | 1481 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: English | 1315 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: Chinese | 1400 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: reading text | 1329 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: humor | 1293 | Not measured | Only Claude Opus 5 measured |
| LMArena Vision: creative writing | 1313 | Not measured | Only Claude Opus 5 measured |
| LMArena Document | 1516 | Not measured | Only Claude Opus 5 measured |
| Neither model has a result on the other 13 boards here | |||
Image generationDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Claude Opus 5 | Nano Banana 2 (Gemini 3.1 Flash Image) | Leader |
|---|---|---|---|
| LMArena Image Edit | Not measured | 1387 | Only Nano Banana 2 (Gemini 3.1 Flash Image) measured |
| Neither model has a result on the other 4 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Claude Opus 5$0.018Fits in one request
Nano Banana 2 (Gemini 3.1 Flash Image)$0.0020Fits in one request
Nano Banana 2 (Gemini 3.1 Flash Image) costs less
Repository review
50K input + 3K output tokens
Claude Opus 5$0.325Fits in one request
Nano Banana 2 (Gemini 3.1 Flash Image)$0.034Fits in one request
Nano Banana 2 (Gemini 3.1 Flash Image) costs less
Agent loop
200K input + 10K output tokens
Claude Opus 5$1.25Fits in one request
Nano Banana 2 (Gemini 3.1 Flash Image)$0.130Exceeds the context window
Nano Banana 2 (Gemini 3.1 Flash Image) costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Anthropic Claude Opus 5 | Google Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Maker | Anthropic | |
| Weights | No public weights listed | No public weights listed |
| Released | July 24, 2026 | June 18, 2026 |
| Context window | 1M | 131K |
| Input $/Mtok | $5.00 | $0.50 |
| Output $/Mtok | $25.00 | $3.00 |
| Coding index | 83.0 | Not benchmarked |
| Independent measurements behind it | 6 | 0 |
| Cost per solved task | $1.33 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 5 better than Nano Banana 2 (Gemini 3.1 Flash Image) for coding?
Only Claude Opus 5 has a coding score, 83.0 on the Vibe Coding Index; Nano Banana 2 (Gemini 3.1 Flash Image) has none, so the two cannot be ranked on coding. Pick Nano Banana 2 (Gemini 3.1 Flash Image) for output tokens 8.3x cheaper ($3.00 vs $25.00 per million).
Which is cheaper, Claude Opus 5 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens; Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50 and $3.00. Cost per solved task is known for Claude Opus 5 only.
Which has the bigger context window, Claude Opus 5 or Nano Banana 2 (Gemini 3.1 Flash Image)?
Claude Opus 5, with 1M tokens against 131K.
Has any benchmark tested both Claude Opus 5 and Nano Banana 2 (Gemini 3.1 Flash Image)?
No benchmark has tested both yet. Claude Opus 5 has results on LiveBench coding, LMArena WebDev and AA Coding Index; Nano Banana 2 (Gemini 3.1 Flash Image) on LMArena Image Edit. Compare them on price and context instead. Data as of October 21, 2026.