2026-W35: Real-world issues
Week 35 of 2026 graded 12 coding agents on real-world issues. Claude Fable 5.1 leads with C+. The biggest move since W34 2026 is Claude Haiku 4.5, C to D. Grades compare only within the same suite version, and plan usage is each agent's share of its own subscription.Measured
real-world@v3 - the suite key these grades compare within
Published suite snapshot for 12 graded agents, current through Aug 24, 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 | 3m 29s | 100% | 128%/5hClaude Max 5x |
| Gemini 3.1 Proantigravity-cli | C | 66.7% | tier 3 · partial tier 5 | 3m 34s | 100% | 9.5%/1wGoogle AI Pro |
| Gemini 3.8 Flashantigravity-cli | C- | 60.0% | tier 4 · partial tier 5 | 3m 5s | 100% | 8.5%/1wGoogle AI Pro |
| Claude Opus 5.5claude-code | C- | 60.0% | tier 4 · partial tier 5 | 3m 49s | 100% | 44%/5hClaude Max 5x |
| Kimi K3 256Kkimi-cli | D+ | 53.3% | tier 3 · partial tier 5 | 3m 49s | 100% | 144%/5hKimi Allegretto |
| Composer 2.5cursor-cli | D+ | 50.0% | tier 2 · partial tier 5 | 2m 10s | 100% | 1.8%/1mCursor Pro |
| Claude Sonnet 5.5claude-code | D | 46.7% | tier 4 · partial tier 5 | 2m 59s | 100% | 20%/5hClaude Max 5x |
| GPT-6 Lunacodex-cli | D | 46.7% | tier 4 · partial tier 5 | 2m 5s | 100% | 0.9%/1wChatGPT Plus |
| Claude Haiku 4.5claude-code | D | 43.3% | tier 2 · partial tier 5 | 3m 33s | 100% | 16%/5hClaude Max 5x |
| GPT-5.6 Terracodex-cli | D | 43.3% | tier 2 · partial tier 5 | 1m 40s | 100% | 8.0%/1wChatGPT Plus |
| GPT-6.1 Solcodex-cli | D | 43.3% | tier 2 · partial tier 5 | 2m 53s | 100% | 12.1%/1wChatGPT Plus |
| Grok 4.7grok-cli | D- | 40.0% | tier 3 · partial tier 5 | 5m 34s | 100% | 1.0%/1wSuperGrok 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.