Claude Sonnet 5 vs Flint
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Sonnet 5 is meaningfully stronger at long context (92 vs 0 on our capability index).
- •Flint is open-weights (free to self-host); Claude Sonnet 5 is paid API only.
Specs comparison
| Claude Sonnet 5 | Flint | |
|---|---|---|
| Provider | Anthropic | Springboards |
| Type | Closed source | Closed source |
| Context window | ✓1M | Not announced |
| Input / 1M tokens | $3.00 | ✓Not announced |
| Output / 1M tokens | $15.00 | Not announced |
| Release date | 2026-06 | 2026-04 |
Benchmarks
| Benchmark | Claude Sonnet 5 | Flint |
|---|---|---|
| SWE-bench Verified | ~85.2% | - |
| Terminal-Bench 2.1 | 80.4% | - |
| SWE-bench Pro | 63.2% | - |
| OSWorld-Verified | 81.2% | - |
| Novelty Bench | - | 7/10 |
| Intra-Model Similarity | - | 0.721 |
| NoveltyBench | - | 7.47 |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Sonnet 5 if...
- →You want frontier-adjacent agentic coding but need better cost-efficiency than Opus
- →You are running high-volume agent loops and want strong reasoning per dollar
- →You are already on Sonnet 4.6 and want a same-price capability upgrade
- →You need a 1M context window with fast latency
Choose Flint if...
- →When exploring diverse creative directions
- →For early-stage ideation and concept generation
- →When variety and novelty are more important than accuracy