Claude Fable 5 vs Laguna XS.2 vs Nemotron 3 Nano Omni 30B A3B Reasoning
Claude Fable 5 comes out ahead, 72 to 68 and 36 on our weighted score, though Nemotron 3 Nano Omni 30B A3B Reasoning is 50× cheaper per token.
- Our pick
AnthropicClaude Fable 5
72/100- ECI162.2
- Price$10.00 / $50.00
- Context1M
PoolsideLaguna XS.2
36/100- ECI—
- Price—
- Context262K
NVIDIANemotron 3 Nano Omni 30B A3B Reasoning
68/100- ECI—
- Price$0.25 / $0.85
- Context256K
Claude Fable 5 is our pick
Claude Fable 5 is the better all-round choice, scoring 72/100 against Nemotron 3 Nano Omni 30B A3B Reasoning (68) and Laguna XS.2 (36). It leads on context window. Nemotron 3 Nano Omni 30B A3B Reasoning wins on inputs & features. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceNemotron 3 Nano Omni 30B A3B ReasoningNemotron 3 Nano Omni 30B A3B Reasoning $0.40 · Claude Fable 5 $20.00 per 1M tokens (3:1 blend) · Laguna XS.2 unpriced
- Longest contextClaude Fable 5Claude Fable 5 1,000,000 · Laguna XS.2 262,144 · Nemotron 3 Nano Omni 30B A3B Reasoning 256,000 tokens
- Widest inputsNemotron 3 Nano Omni 30B A3B ReasoningClaude Fable 5: Text, Images, PDFs · Laguna XS.2: Text · Nemotron 3 Nano Omni 30B A3B Reasoning: Text, Images, Audio, Video
- Self-hostingLaguna XS.2 and Nemotron 3 Nano Omni 30B A3B ReasoningPublishes downloadable weights
| Measure | Weight | Claude Fable 5 | Laguna XS.2 | Nemotron 3 Nano Omni 30B A3B Reasoning |
|---|---|---|---|---|
| Inputs & features | 60% | 80 | 35 | 90 |
| Context window | 40% | 60 | 37 | 36 |
| Overall | 100% | 72/100 | 36/100 | 68/100 |
Left out because at least one model lacks the data: capability and price. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Claude Fable 5Anthropic | Laguna XS.2Poolside | Nemotron 3 Nano Omni 30B A3B ReasoningNVIDIA |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 162.2 | — | — |
| ECI rank | #7 of 148 | — | — |
| GPQA DiamondGraduate-level science questions | 85.9% | — | — |
| FrontierMath Tiers 1–3Research-level mathematics | 87.0% | — | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 100% | — | — |
| SimpleQA VerifiedShort factual questions | 70.7% | — | — |
| Price per million tokens | |||
| Input | $10.00 | — | $0.25 (best) |
| Output | $50.00 | — | $0.85 (best) |
| Cached input | $1.00 | — | — |
| Blended (3:1) | $20.00 | — | $0.40 (best) |
| Long-context rate | Same rate | — | Same rate |
| Price source | Official Anthropic API | — | Median of 4 providers |
| Limits | |||
| Context window | 1,000,000 tokens (best) | 262,144 tokens | 256,000 tokens |
| Max output | 128,000 tokens (best) | 32,768 tokens | 65,536 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | Yes |
| PDFs | Yes | No | No |
| Audio | No | No | Yes |
| Video | No | No | Yes |
| Reasoning | Yeslow · medium · high · xhigh · max | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | Yes |
| Availability | |||
| Weights | Proprietary | Open | Open |
| API model ID | claude-fable-5 | — | nvidia/nemotron-3-nano-omni-30b-a3b-reasoning |
| API providers | 38 (best) | 1 | 8 |
| Released | Jun 9, 2026 | Apr 28, 2026 | Apr 28, 2026 |
| Knowledge cutoff | Jan 31, 2026 | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Claude Fable 5$200.00
- Laguna XS.2—
- Nemotron 3 Nano Omni 30B A3B Reasoning$4.20
Which should you choose?
Which is better: Claude Fable 5, Laguna XS.2 or Nemotron 3 Nano Omni 30B A3B Reasoning?
Claude Fable 5 is the better all-round choice, scoring 72/100 against Nemotron 3 Nano Omni 30B A3B Reasoning (68) and Laguna XS.2 (36). It leads on context window. Nemotron 3 Nano Omni 30B A3B Reasoning wins on inputs & features. The score weighs inputs & features 60%, context window 40%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Claude Fable 5, Laguna XS.2 or Nemotron 3 Nano Omni 30B A3B Reasoning?
Nemotron 3 Nano Omni 30B A3B Reasoning is cheaper at $0.25 input / $0.85 output per million tokens (median across 4 API providers; free on Nvidia). Claude Fable 5 costs $10.00 input / $50.00 output per million tokens (official Anthropic API price). At a typical mix of three input tokens to one output token, that is $0.40 per million tokens for Nemotron 3 Nano Omni 30B A3B Reasoning versus $20.00 for Claude Fable 5 (50× as much). Laguna XS.2 has no published per-token price.
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Claude Fable 5 has an ECI of 162.2, Laguna XS.2 has not been scored yet and Nemotron 3 Nano Omni 30B A3B Reasoning has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Claude Fable 5, Laguna XS.2 and Nemotron 3 Nano Omni 30B A3B Reasoning yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Claude Fable 5 has the largest context window at 1,000,000 tokens, against 262,144 for Laguna XS.2 and 256,000 for Nemotron 3 Nano Omni 30B A3B Reasoning. Maximum output per response: Claude Fable 5 up to 128,000, Laguna XS.2 up to 32,768, Nemotron 3 Nano Omni 30B A3B Reasoning up to 65,536 tokens.
Which can read images, PDFs, audio or video?
Claude Fable 5 accepts text, images and PDFs; Laguna XS.2 accepts text; Nemotron 3 Nano Omni 30B A3B Reasoning accepts text, images, audio and video. Nemotron 3 Nano Omni 30B A3B Reasoning handles the widest range of inputs.
Are any of these open source?
Laguna XS.2 and Nemotron 3 Nano Omni 30B A3B Reasoning publishes its weights and can be self-hosted; Claude Fable 5 is proprietary.
Which is newer?
Claude Fable 5 is the newest, released Jun 9, 2026. Laguna XS.2 came out Apr 28, 2026; Nemotron 3 Nano Omni 30B A3B Reasoning came out Apr 28, 2026. Knowledge cutoff: Claude Fable 5 Jan 31, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
