Compare · ModelsLive · 2 picked · head to head
Claude Haiku 4.5 vs gpt-oss-20b
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Haiku 4.5 wins on 7/7 benchmarks
Claude Haiku 4.5 wins 7 of 7 shared benchmarks. Leads in knowledge · general · math.
Category leads
knowledge·Claude Haiku 4.5general·Claude Haiku 4.5math·Claude Haiku 4.5coding·Claude Haiku 4.5
Hype vs Reality
Attention vs performance
Claude Haiku 4.5
#231 by perf·#13 by attention
gpt-oss-20b
#97 by perf·no signal
Best value
gpt-oss-20b
86.8x better value than Claude Haiku 4.5
Claude Haiku 4.5
11.3 pts/$
$3.00/M
gpt-oss-20b
983.3 pts/$
$0.05/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
7 benchmarks · 2 models
Claude Haiku 4.5gpt-oss-20b
Chess Puzzles
Claude Haiku 4.5 leads by +3.2
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Haiku 4.5
3.2
gpt-oss-20b
0.0
Dtbench
Claude Haiku 4.5 leads by +9.3
Claude Haiku 4.5
56.0
gpt-oss-20b
46.7
GPQA diamond
Claude Haiku 4.5 leads by +13.9
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Haiku 4.5
61.6
gpt-oss-20b
47.7
Lmca
Claude Haiku 4.5 leads by +19.3
Claude Haiku 4.5
36.4
gpt-oss-20b
17.1
OTIS Mock AIME 2024-2025
Claude Haiku 4.5 leads by +1.4
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Haiku 4.5
66.6
gpt-oss-20b
65.2
Terminal Bench
Claude Haiku 4.5 leads by +32.1
Terminal-Bench 2.0 · evaluates AI agents on real terminal-based coding tasks · writing scripts, debugging, running tests, and managing projects entirely through command-line interaction. Tests both code quality and terminal fluency. Claude Opus 4.7 scores 69.4%, demonstrating significant agentic terminal competence.
Claude Haiku 4.5
35.5
gpt-oss-20b
3.4
WeirdML
Claude Haiku 4.5 leads by +4.5
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Haiku 4.5
45.4
gpt-oss-20b
40.9
Full benchmark table
| Benchmark | Claude Haiku 4.5 | gpt-oss-20b |
|---|---|---|
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 3.2 | 0.0 |
Dtbench | 56.0 | 46.7 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 61.6 | 47.7 |
Lmca | 36.4 | 17.1 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 66.6 | 65.2 |
Terminal Bench Terminal-Bench 2.0 · evaluates AI agents on real terminal-based coding tasks · writing scripts, debugging, running tests, and managing projects entirely through command-line interaction. Tests both code quality and terminal fluency. Claude Opus 4.7 scores 69.4%, demonstrating significant agentic terminal competence. | 35.5 | 3.4 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 45.4 | 40.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $1.00 | $5.00 | 200K tokens (~100 books) | $20.00 | |
| $0.02 | $0.09 | 131K tokens (~66 books) | $0.36 |
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