Flint vs GPT-5.6 Sol
Pricing, benchmarks, and use case comparison
Quick take
- •GPT-5.6 Sol is meaningfully stronger at coding (97 vs 3).
- •Flint is open-weights (free to self-host); GPT-5.6 Sol is paid API only.
Specs comparison
| Flint | GPT-5.6 Sol | |
|---|---|---|
| Provider | Springboards | OpenAI |
| Type | Closed source | Closed source |
| Context window | Not announced | Not announced |
| Input / 1M tokens | ✓Not announced | $5.00 |
| Output / 1M tokens | Not announced | $30.00 |
| Release date | 2026-04 | 2026-06 |
Benchmarks
| Benchmark | Flint | GPT-5.6 Sol |
|---|---|---|
| Novelty Bench | 7/10 | - |
| Intra-Model Similarity | 0.721 | - |
| NoveltyBench | 7.47 | - |
| Terminal-Bench 2.1 | - | 88.8% |
| Terminal-Bench 2.1 (Ultra) | - | 91.9% |
| ExploitBench | - | competitive with Mythos Preview |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Flint if...
- →When exploring diverse creative directions
- →For early-stage ideation and concept generation
- →When variety and novelty are more important than accuracy
Choose GPT-5.6 Sol if...
- →You are an approved preview partner needing the most capable model for agentic software engineering
- →Complex multi-step tasks that benefit from subagent orchestration (Ultra) or maximum reasoning depth (max)
- →Frontier scientific research, professional knowledge work, or security-sensitive workloads