# Claude 4 Sonnet vs Ember-1

> Side-by-side benchmark comparison for Claude 4 Sonnet and Ember-1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-4-sonnet-vs-ember-1
- Last updated: September 28, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude 4 Sonnet and Ember-1 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Ember-1 has the larger published context window at 1.04M.

## Model Snapshot

| Property | Claude 4 Sonnet | Ember-1 |
|----------|----------|----------|
| Creator | Anthropic | Fireworks |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1.04M |
| Independent public score (not head-to-head) | 36.08 | null |
| Benchmarks Covered | 3 | 5 |
| Pricing (input/output) | $3.00 / $15.00 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: Coming soon
- Ember-1 public-lane score: Coming soon

| Benchmark | Claude 4 Sonnet | Ember-1 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 39.66% | Coming soon | Coming soon |
| JobBench | 18.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.0% | Coming soon |
| τ²-bench Airline | Coming soon | 66.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: Coming soon
- Ember-1 public-lane score: Coming soon

| Benchmark | Claude 4 Sonnet | Ember-1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 72.7% | 92.2% | Ember-1 |
| Terminal-Bench 2.1 | Coming soon | 82.0% | Coming soon |
| DeepSWE | Coming soon | 75.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: 52.5 (Unranked · 2 rankable rows)
- Ember-1 public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: 53 (Unranked · 1 rankable row)
- Ember-1 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: 37.1 (Estimated · #106/168)
- Ember-1 public-lane score: Coming soon

### Instruction Following

- Winner: Insufficient shared evidence
- Claude 4 Sonnet public-lane score: 52 (#78/124)
- Ember-1 public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between Claude 4 Sonnet and Ember-1?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude 4 Sonnet vs GPT-6 Astra](/compare/claude-4-sonnet-vs-gpt-6-astra)
- [Ember-1 vs GPT-6 Astra](/compare/ember-1-vs-gpt-6-astra)
- [Claude 4 Sonnet vs Claude Opus 5.5](/compare/claude-4-sonnet-vs-claude-opus-5-5)
- [Ember-1 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ember-1)

## Explore More

- [Claude 4 Sonnet profile](/models/claude-4-sonnet)
- [Ember-1 profile](/models/ember-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)