2026-W36: Real-world issues
Week 36 of 2026 graded 13 coding agents on real-world issues. Claude Fable 5.1 leads with C+. The biggest move since W35 2026 is Grok 4.7, D- to C-. Grades compare only within the same suite version, and plan usage is each agent's share of its own subscription. Every agent ran the same suite cut headless through its own tools.Measured
real-world@v3 - the suite key these grades compare within
Published suite snapshot for 13 graded agents, current through Sep 5, 2026.
Sorted by capability. Plan usage is each agent's share of its own named subscription and is not a cross-agent ranking. See the Real-world issues methodology or each agent's scorecard for full context.
| Agent | Grade | Capability | Clears | Task time | Reliability | Plan usage |
|---|---|---|---|---|---|---|
| Claude Fable 5.1claude-code | C+ | 73.3% | tier 4 · partial tier 5 | 1m 46s | 100% | 112%/5hClaude Max 5x |
| Claude Haiku 4.5claude-code | C | 61.7% | tier 1 · partial tier 5 | 3m 31s | 100% | 16%/5hClaude Max 5x |
| GPT-6.1 Solcodex-cli | C- | 60.0% | tier 4 · partial tier 5 | 2m 50s | 100% | 12.6%/1wChatGPT Plus |
| Grok 4.7grok-cli | C- | 60.0% | tier 4 · partial tier 5 | 12m 47s | 100% | 1.0%/1wSuperGrok Plus |
| GPT-6 Astracodex-cli | C- | 56.7% | tier 2 · partial tier 5 | 1m 56s | 100% | 15%/1wChatGPT Plus |
| Composer 2.5cursor-cli | C- | 56.7% | tier 2 · partial tier 5 | 1m 49s | 100% | 1.8%/1mCursor Pro |
| Kimi K3 256Kkimi-cli | C- | 56.7% | tier 2 · partial tier 5 | 3m 34s | 100% | 140%/5hKimi Allegretto |
| Gemini 3.8 Flashantigravity-cli | D+ | 53.3% | tier 3 · partial tier 5 | 4m 14s | 100% | 20.4%/1wGoogle AI Pro |
| Gemini 3.1 Proantigravity-cli | D | 46.7% | tier 3 · partial tier 5 | 3m 14s | 100% | 9.0%/1wGoogle AI Pro |
| Claude Opus 5.5claude-code | D | 46.7% | tier 4 · partial tier 5 | 3m 8s | 100% | 36%/5hClaude Max 5x |
| Claude Sonnet 5.5claude-code | D | 46.7% | tier 4 · partial tier 5 | 3m 2s | 100% | 20%/5hClaude Max 5x |
| GPT-5.6 Terracodex-cli | D | 42.5% | none | 1m 42s | 100% | 9.2%/1wChatGPT Plus |
| GPT-6 Lunacodex-cli | D | 41.7% | tier 1 · partial tier 5 | 1m 53s | 100% | 1%/1wChatGPT Plus |
This page publishes aggregate outcomes only. Task prompts and private checker logic never leave the benchmark. Follow this suite over time on Grades over time.